% MSA symbols, roman style [1996/07/02 v1.0 (WaS)]

def makesquare (suffix i,j,k,l) = 
%% z.j, z.k are the lower left and right corners 
%%          assumed on baseline; ie, y.k=y.j=0 
%% z.i, z.l are upper left and right corners 
%% that is, start labeling with upper left corner, and 
%% proceed to the successive corners counter-clockwise. 
y.i-y.j=x.k-x.j; y.i:=good.y y.i+o; y.l=y.i 
%% user must draw the square him/herself. 
enddef; 

 
cmchar "Square with dot";
beginchar(oct"000",14u#,12u#,0);
adjust_fit(0,0); pickup rule.nib;
lft x1=hround 1.0u; x2=x1; x4=x5=w-x1;
bot y2=0; y4=y2; 
makesquare (1,2,4,5);  
y3=good.y .5[y1,y2]; x3=good.x .5[x1,x5];
draw z1---z2---z4---z5---cycle;  % square 
fill fullcircle scaled dot_size shifted z3;  % dot 
penlabels(1,2,3,4,5); endchar; 

cmchar "Square plus";
beginchar(oct"001",14u#,12u#,0);
adjust_fit(0,0); pickup rule.nib;
lft x1=hround 1.0u; x2=x1; x4=x5=w-x1;
bot y2=0; y4=y2; makesquare(1,2,4,5); 
draw z1---z2---z4---z5---cycle;  % square 
x6=x1; x7=x4; y6=.5[y1,y2]; y7=y6; % cross strut 
y8=y1; y9=y2; x8=.5[x1, x5]; x9=x8; % vertical strut 
draw z6---z7; draw z8---z9; % plus 
penlabels(1,2,4,5,6,7,8,9); endchar; 
 
cmchar "Square times";
beginchar(oct"002",14u#,12u#,0);
adjust_fit(0,0); pickup rule.nib;
lft x1=hround 1.0u; x2=x1; x4=x5=w-x1;
bot y2=0; y4=y2; makesquare(1,2,4,5); 
draw z1---z2---z4---z5---cycle;  % square 
draw z1---z4; draw z2---z5;  % diagonals 
penlabels(1,2,4,5); endchar; 
 
cmchar "Square";  
beginchar(oct"003",14u#,12u#,0); 
adjust_fit(0,0); pickup rule.nib;  
lft x1=hround 1.0u; x2=x1; 
x4=x5=w-x1; 
bot y2=0; y4=y2; makesquare(1,2,4,5); 
draw z1---z2---z4---z5---cycle;  % square 
penlabels(1,2,4,5); endchar; 
 
cmchar "Filled square";
beginchar(oct"004",14u#,12u#,0);
adjust_fit(0,0); pickup rule.nib;
lft x1=hround 1.0u; x2=x1; x4=x5=w-x1;
bot y2=0; y4=y2; makesquare(1,2,4,5); 
filldraw z1---z2---z4---z5---cycle;  % square 
penlabels(1,2,4,5); endchar; 
 
cmchar "Small filled square"; 
beginchar(oct"005",5u#,.8asc_height#,0); 
adjust_fit(0,0); pickup rule.nib; 
lft x1=hround 1.0u; x2=x1; x3=x4=w-x1; 
bot y2=0; y3=y2; makesquare(1,2,3,4); 
filldraw z1---z2---z3---z4---cycle;  % draw and fill square 
penlabels(1,2,3,4); endchar; 
 
 
cmchar "Diamond"; 
beginchar(oct"006",12u#,asc_height#,2u#); 
adjust_fit(0,0); pickup rule.nib; 
%% z1, z2 are left & right vertices 
%% z3, z4 are top and bottom points 
lft x1=hround u; x2=w-x1; y1=y2; 
x3=x4=.5[x1, x2]; bot y4=-d-o; top y3= good.y h+o; 
y1=.5[y4,y3]; 
draw z1---z3---z2---z4---cycle; % draw diamond 
penlabels(1,2,3,4); endchar; 
 
cmchar "Filled Diamond"; 
beginchar(oct"007",12u#,asc_height#,2u#); 
adjust_fit(0,0); pickup rule.nib; 
%% z1, z2 are left & right vertices 
%% z3, z4 are top and bottom points 
lft x1=hround u; x2=w-x1; y1=y2; 
x3=x4=.5[x1, x2]; bot y4=-d-o; top y3= good.y h+o; 
y1=.5[y4,y3]; 
filldraw z1---z3---z2---z4---cycle; % draw diamond 
penlabels(1,2,3,4); endchar; 

% do char "011 before char "010. 
cmchar "Counter-clockwise-circle indicator"; 
beginarithchar(oct"011"); pickup light_rule.nib; 
autorounded; lft x6=hround u; x2=w-x6;  
y2=math_axis; top y8=h; 
circle_points; % define points on circumference 
%% see page 487 of vol E 
path p; numeric t; 
p=z8{right}...z1{z2-z8}...z2{down}...z3{z4-z2}...z4{left} 
 ...z5{z6-z4}...z6{up}...z7{z8-z6}...cycle; 
t=xpart(p intersectiontimes ((4.5u,0)--(4.5u,y8))); 
draw subpath (0,t) of p; % circle with gap 
z0=.5[z5,z1]; % the origin of the circle 
%% Now prepare for left arrowhead--see pg E465 
pickup crisp.nib; 
pos12(rule_thickness,90); pos13(bar,0); pos14(bar,0); 
y10=y12=y8; lft x10=hround x8; 
y13-y10=y10-y14=.19asc_height+eps; x13=x14=x10+3u+eps; 
pos15(bar,angle(z14-z10)); z15l=z10; 
pos16(bar,angle(z13-z10)); z16l=z10; 
z19=.38[.5[z13,z14],z10]; 
numeric t; path p; % re-use t, p 
p=z14r{z19-z14}..z16r; 
t=xpart(p intersectiontimes((0,y12l)--(w,y12l)));  
x12=xpart point t of p; 
path p; 
p=z10..{z14-z19}z14l--subpath(0,t) of 
(z14r{z19-z14}..z16r)--z12l--z12r 
--subpath(t,0) of (z13r{z19-z13}..z15r) 
--z13l{z19-z13}..z10&cycle; % arrowhead 
p:=p shifted -z8; % move back to origin 
p:=p rotated -16; % rotate down a bit 
p:=p shifted z8; % move back to tip of circle 
filldraw  p; 
penlabels(0,1,2,3,5,6,7,8,9,10,11,12,13,14,15,16,19);  
picture v; v:=currentpicture; endchar; 
 
cmchar "Clockwise-circle indicator"; 
beginarithchar(oct"010");  
currentpicture:=v reflectedabout ((w/2,0),(w/2,h)); 
penlabels(0,1,2,3,5,6,7,8,9,10); endchar; 
 
cmchar "Left-Right Harpoons"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"013",18u#,v_center(spread#+.48asc_height#));  
path topleft; % for top left half arrow (harpoon) 
adjust_fit(0,0);  
pickup crisp.nib;  
pos1(rule_thickness,90); pos2(rule_thickness,90); 
pos3(bar,0); pos4(bar,0); y0=y1=y2=math_axis; 
x1+.5rule_thickness=hround(w-u); lft x0=hround u; 
y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0+3u+eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); 
z6l=z0; numeric t; path p; p=z4r..{2(x0-x4),y0-y4}z6r; 
t=xpart(p intersectiontimes((0,y2l)--(w,y2l)));  
x2=xpart point t of p;  
topleft=z0--(x0,y2l)---z1l..z1r---z2r 
 ..subpath (t,0) of\\(z3r..{2(x0-x3),y0-y3}z5r) 
 --z3l..{2(x0-x3),y0-y3}cycle;  % arrowhead and stem 
topleft:= 
topleft shifted (0,.5spread); % shift above math_axis 
path botright; % for bottom right half arrow   
botright:=topleft reflectedabout ((w/2,0),(w/2,h)); 
botright:=botright reflectedabout 
((0,math_axis+eps),(w,math_axis+eps)); 
filldraw topleft; filldraw botright; 
penlabels(0,1,2,3,4,5,6); endchar;  
 
cmchar "Right-Left Harpoons"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"012",18u#,v_center(spread#+.48asc_height#)); 
path topright, botleft; 
adjust_fit(0,0);  
pickup crisp.nib;  
topright:=topleft reflectedabout((w/2,0),(w/2,h)); 
botleft:=botright reflectedabout((w/2,0),(w/2,h)); 
filldraw topright; filldraw botleft; endchar; 
 
cmchar "Square minus"; 
beginchar(oct"014",14u#,12u#,0); adjust_fit(0,0); 
pickup rule.nib; lft x1=hround 1.0u; x2=x1; x4=x5=w-x1; bot 
y2=0; y4=y2; makesquare(1,2,4,5); 
draw z1---z2---z4---z5---cycle;  % square 
x6=x1; x7=x4; y6=.5[y1,y2]; y7=y6; % cross strut 
draw z6---z7;  % minus 
penlabels(1,2,4,5,6,7); endchar;  
 
cmchar "Forces"; 
beginchar(oct"015",13u#,asc_height#,0); 
adjust_fit(0,0);; pickup rule.nib; 
top y1=h; bot y2=0; y3=y4=good.y .5h; y5=y1; y6=y2; 
lft x5=hround u; x4=w-x5;  
compute_spread(.45x_height#,.55x_height#); 
x1=x5+spread; x1=x2=x3; x6=x5; 
draw z6--z5; draw z2--z1; draw z3--z4; 
penlabels(1,2,3,4,5,6); endchar; 
 
cmchar "Forces with extra bar"; 
beginchar(oct"016",16u#, asc_height#,0);  
adjust_fit(0,0); pickup rule.nib; 
compute_spread(.42x_height#,.52x_height#); 
top y1=h; bot y2=0; y3=y4=good.y .5h; 
y5=y7=y1; y6=y8=y2; lft x7=hround u; x4=w-x7; 
x5=good.x x7+spread; x1=good.x x5+spread; 
x1=x2=x3; x6=x5; x7=x8; 
draw z7--z8; draw z5--z6; draw z1--z2; % verticals 
draw z3--z4; % horizontal piece 
penlabels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Satisfies"; 
beginchar(oct"017",11u#,asc_height#,0); 
adjust_fit(0,0); pickup rule.nib; 
compute_spread(.45x_height#,.55x_height#); 
top y1=h; bot y2=0; y0=good.y .5[y1,y2];  
y3=vround y0+.5spread; 
y5=vround y0- .5spread; y4=y3; y6=y5;  
lft x1=hround u; x4=w-x1; 
x1=x2=x3=x5; x4=x6; x0=x1; 
draw z1--z2; % vertical line 
draw z3--z4; % draw top horizontal piece 
draw z5--z6; % draw bottom horizontal piece 
penlabels(0,1,2,3,4,5,6); endchar; 
 
cmchar "Rightward double arrowhead"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"020",18u#,v_center(spread#+.48asc_height#)); adjust_fit(0,0); 
pickup crisp.nib;  pos1(rule_thickness,90); pos2(rule_thickness,90); 
pos3(bar,0); pos4(bar,0);  y0=y1=y2=math_axis; x1-.5rule_thickness=hround u;  
rt x0=hround(w-u); y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0-3u-eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); z6l=z0; 
z9=.381966[.5[z3,z4],z0]; numeric t; path p; p=z4l{z9-z4}..z6r;  t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l)));  x2=xpart point t of p;  path p; 
p=z0..{z4-z9}z4r--subpath (0,t) of\\(z4l{z9-z4}..z6r) 
 --z2l--z2r--subpath (t,0) of\\(z3l{z9-z3}..z5r) 
 --z3r{z9-z3}..z0 & cycle; 
filldraw z0..{z4-z9}z4r--subpath (0,t) of\\(z4l{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3l{z9-z3}..z5r) 
 --z3r{z9-z3}..z0 & cycle;  % arrowhead and stem 
filldraw p shifted (x3l-x0,0); 
penlabels(0,1,2,3,4,5,6,9); endchar; 
 
cmchar "Leftward double arrowhead"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"021",18u#,v_center(spread#+.48asc_height#)); 
adjust_fit(0,0); pickup crisp.nib;  
pos1(rule_thickness,90); pos2(rule_thickness,90); 
pos3(bar,0); pos4(bar,0); y0=y1=y2=math_axis; 
x1+.5rule_thickness=hround(w-u); lft x0=hround u; 
y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0+3u+eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); 
z6l=z0; z9=.381966[.5[z3,z4],z0];  
numeric t; path p;  
p=z4r{z9-z4}..z6r;  
t=xpart(p intersectiontimes((0,y2l)--(w,y2l)));  
x2=xpart point t of p;  
path p; p=z0..{z4-z9}z4l--subpath (0,t) 
of\\(z4r{z9-z4}..z6r) 
 --z2l--z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle; % second arrowhead 
filldraw z0..{z4-z9}z4l--subpath (0,t) of\\(z4r{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and stem  
filldraw p shifted (x3r-x0,0); 
penlabels(0,1,2,3,4,5,6,9); endchar;  
 
cmchar "Leftward double arrow"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"022",18u#,v_center(spread#+.96asc_height#)); 
adjust_fit(0,0); pickup crisp.nib; pos1(rule_thickness,90); 
pos2(rule_thickness,90); pos3(bar,0); pos4(bar,0); 
y0=y1=y2=math_axis; x1+.5rule_thickness=hround(w-u); lft 
x0=hround u; y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0+3u+eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); 
z6l=z0; z9=.381966[.5[z3,z4],z0]; numeric t; path p; 
p=z4r{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p;  
path p; % re-use p 
p=z0..{z4-z9}z4l--subpath (0,t) of\\(z4r{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and stem 
p:=p shifted (0,y2-y4+eps); filldraw p; % top arrow 
p:= p shifted (0,y4-y3-eps); filldraw p; % bottom arrow 
penlabels(0,1,2,3,4,5,6,9); endchar; 

cmchar "Rightward double arrow"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"023",18u#,v_center(spread#+.96asc_height#)); 
adjust_fit(0,0); pickup crisp.nib; pos1(rule_thickness,90); 
pos2(rule_thickness,90); pos3(bar,0); pos4(bar,0); 
y0=y1=y2=math_axis; x1-.5rule_thickness=hround u; rt 
x0=hround(w-u); y3-y0=y0-y4=.24asc_height+eps; 
x3=x4=x0-3u-eps; pos5(bar,angle(z4-z0)); z5l=z0; 
pos6(bar,angle(z3-z0)); z6l=z0; z9=.381966[.5[z3,z4],z0]; 
numeric t; path p; p=z4l{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p; 
path p; p=z0..{z4-z9}z4r--subpath (0,t) 
of\\(z4l{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3l{z9-z3}..z5r) 
 --z3r{z9-z3}..z0 & cycle;  % arrowhead and stem 
p:=p shifted (0,y2-y4+eps); filldraw p; % top 
p:=p shifted (0,y4-y3-eps); filldraw p; %bottom 
penlabels(0,1,2,3,4,5,6,9); endchar; 

cmchar "Double upward arrow"; 
beginchar(oct"024",15u#,asc_height#,asc_depth#); italcorr 
.76asc_height#*slant+.5crisp#-u#; adjust_fit(0,0); pickup 
crisp.nib; pos1(rule_thickness,0); pos2(rule_thickness,0); 
pos3(bar,90); pos4(bar,90); lft 
x1l=hround(.5w-.5rule_thickness); y1-.5rule_thickness=-d; 
x0=x1=x2; top y0=h; x0-x3=x4-x0=3u+eps; 
y3=y4=y0-.24asc_height-eps; pos5(bar,angle(z4-z0)); z5l=z0; 
pos6(bar,angle(z3-z0)); z6l=z0; z9=.381966[.5[z3,z4],z0]; 
numeric t; path p; p=z4l{z9-z4}..z6r; t=xpart(p 
intersectiontimes((x2r,-d)--(x2r,h))); y2=ypart point t of 
p; 
path p; p=z0..{z4-z9}z4r--subpath (0,t) 
of\\(z4l{z9-z4}..z6r) 
 --z2r---z1r..z1l---z2l--subpath (t,0) of\\(z3l{z9-z3}..z5r) 
 --z3r{z9-z3}..z0 & cycle;  % arrowhead and stem 
p:=p shifted (x0-x4-eps,0); filldraw p; % left arrow 
p:=p shifted (x4-x3+eps,0); filldraw p; 
penlabels(0,1,2,3,4,5,6,9); endchar; 
 
cmchar "Double downward arrow"; 
beginchar(oct"025",15u#,asc_height#,asc_depth#); 
adjust_fit(0,0); pickup crisp.nib; pos1(rule_thickness,0); 
pos2(rule_thickness,0); pos3(bar,90); pos4(bar,90); lft 
x1l=hround(.5w-.5rule_thickness); y1+.5rule_thickness=h; 
x0=x1=x2; bot y0=-d; x0-x3=x4-x0=3u+eps; 
y3=y4=y0+.24asc_height+eps; pos5(bar,angle(z4-z0)); z5l=z0; 
pos6(bar,angle(z3-z0)); z6l=z0; z9=.381966[.5[z3,z4],z0]; 
numeric t; path p; p=z4r{z9-z4}..z6r; t=xpart(p 
intersectiontimes((x2r,-d)--(x2r,h))); y2=ypart point t of 
p; 
path p; p=z0..{z4-z9}z4l--subpath (0,t) 
of\\(z4r{z9-z4}..z6r) 
 --z2r---z1r..z1l---z2l--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and stem  
p:=p shifted (x0-x4-eps,0); filldraw p; % left arrow 
p:=p shifted (x4-x3+eps,0); filldraw p; 
penlabels(0,1,2,3,4,5,6,9); endchar; 
 
%%  
cmchar "Upward rightward harpoon"; 
beginchar(oct"026",7.5u#,asc_height#, asc_depth#); 
%% see page E431 
adjust_fit(0,0); pickup crisp.nib;  
x0=x1=x2; lft x1l=hround(.5w-.5rule_thickness); 
y1-.5rule_thickness=-d; pos1(rule_thickness,0); 
pos2(rule_thickness,0); pos3(bar,-90); pos4(bar,-90); 
top y0=vround h; 
x3-x0=x0-x4=.24asc_height+eps; y3=y4=y0-3u-eps; 
pos5(bar,angle(z4-z0)); z5l=z0; 
pos6(bar,angle(z3-z0)); z6l=z0; 
z9=.381966[.5[z3,z4],z0];
numeric t; path p; 
p=z4r..{y0-y4,2(x0-x4)}z6r; 
t=xpart (p intersectiontimes ((x2l,0)--(x2l,h)));  
y2=ypart point t of p; 
filldraw z0--(x2l,y0)---z1l..z1r---z2r 
  ..subpath(t,0) of (z3r..{x0-x3,2(y0-y3)}z5r) 
  --z3l..{x0-x3,2(y0-y3)}cycle; 
picture v; v:=currentpicture; 
penlabels(0,1,2,3,4,5,6,9); endchar;  
 
cmchar "Downward rightward harpoon"; 
beginchar(oct"027",7.5u#,asc_height#,asc_depth#); 
adjust_fit(0,0);  
currentpicture:=v 
reflectedabout((0,.5(h-d)*aspect_ratio+eps),(w,.5(h-d)*aspect_ratio+eps)); 
penlabels(0,1,2,3,4,5,6); endchar; 
 
cmchar "Upward leftward harpoon"; 
beginchar(oct"030",7.5u#,asc_height#, asc_depth#); 
adjust_fit(0,0); 
currentpicture:= 
v reflectedabout((w/2+eps,-d),(w/2+eps,h)); 
picture v; v:=currentpicture; 
penlabels(0,1,2,3,4,5,6); endchar; 
 
cmchar "Downward leftward harpoon"; 
beginchar(oct"031",7.5u#,asc_height#,asc_depth#); 
adjust_fit(0,0);  
currentpicture:=v 
reflectedabout((0,.5(h-d)*aspect_ratio+eps),(w,.5(h-d)*aspect_ratio+eps)); 
penlabels(0,1,2,3,4,5,6); endchar; 
 
cmchar "Rightward arrow with tail"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"032",20u#,v_center(spread#+.48asc_height#)); 
adjust_fit(0,0); pickup crisp.nib; pos1(rule_thickness,90); 
pos2(rule_thickness,90); pos3(bar,0); pos4(bar,0); 
y0=y1=y2=math_axis; x1-.5rule_thickness=hround 1.5u; rt 
x0=hround(w-3u); y3-y0=y0-y4=.24asc_height+eps; 
x3=x4=x0-3u-eps; pos5(bar,angle(z4-z0)); z5l=z0; 
pos6(bar,angle(z3-z0)); z6l=z0; z9=.381966[.5[z3,z4],z0]; 
numeric t; path p; p=z4l{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p; 
path p; 
p=z0..{z4-z9}z4r--subpath (0,t) of\\(z4l{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3l{z9-z3}..z5r) 
 --z3r{z9-z3}..z0 & cycle;  % arrowhead and stem 
path arrow; 
arrow=z0..{z4-z9}z4r--subpath (0,t) of\\(z4l{z9-z4}..z6r) 
 --z2l---z2r--subpath (t,0) of\\(z3l{z9-z3}..z5r) 
 --z3r{z9-z3}..z0 & cycle;  
p:=p shifted (2u,0); filldraw p; 
arrow:=arrow shifted (-13u+bar,0); filldraw arrow; 
penlabels(0,1,2,3,4,5,6,9); endchar; 
 
cmchar "Leftward arrow with tail"; 
beginchar(oct"033",20u#,v_center(spread#+.48asc_height#)); 
adjust_fit(0,0); pickup crisp.nib; 
p:= p reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
arrow:= arrow reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
filldraw p; filldraw arrow; 
penlabels(0,1,2,3,4,5,6,9); endchar; 
 
cmchar "Leftward-rightward parallel arrows"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"034",18u#,v_center(spread#+.96asc_height#)); 
adjust_fit(0,0); pickup crisp.nib; pos1(rule_thickness,90); 
pos2(rule_thickness,90); pos3(bar,0); pos4(bar,0); 
y0=y1=y2=math_axis; x1+.5rule_thickness=hround(w-u); lft 
x0=hround u; y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0+3u+eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); 
z6l=z0; z9=.381966[.5[z3,z4],z0]; numeric t; path p; 
p=z4r{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p;  
path p, q; % re-use p 
p=z0..{z4-z9}z4l--subpath (0,t) of\\(z4r{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and stem 
p:=p shifted (0,.5[y3,y4]+eps); filldraw p; % top arrow 
p:= p shifted (0,y4-y3);  
q:= p reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
p:=p shifted (0,y3-y4+eps); % restore p's position 
filldraw q; % bottom arrow 
penlabels(0,1,2,3,4,5,6,9); endchar; 

cmchar "Rightward-leftward parallel arrow"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"035",18u#,v_center(spread#+.96asc_height#)); 
adjust_fit(0,0); pickup crisp.nib;  
p:=p reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
q:=q reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
filldraw p; filldraw q; 
penlabels(0,1,2,3,4,5,6,9); endchar;  
 
cmchar "Leftward shift";  
beginchar(oct"036",9u#,asc_height#, 0); 
adjust_fit(0,0); pickup crisp.nib; pos1(rule_thickness,90); 
pos2(rule_thickness,90); pos3(bar,0); pos4(bar,0); 
y0=y1=y2=.8h; x1+.5rule_thickness=hround(w-u); lft x0=hround 
u; y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0+3u+eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); 
z6l=z0; z9=.381966[.5[z3,z4],z0]; 
z10=z1; x11=x10; y11-.5rule_thickness =vround -d;  
pos10(rule_thickness,0); pos11(rule_thickness,0); 
numeric t; path p; p=z4r{z9-z4}..z6r;  
t=xpart(p intersectiontimes((0,y2l)--(w,y2l)));  
x2=xpart point t of p;  
path p;  
p=z0..{z4-z9}z4l--subpath (0,t) of\\(z4r{z9-z4}..z6r) 
--z2l---(x10l,y1l)--z11l..z11r---{up}z10r..{left}z1r---z2r--subpath 
(t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and bent stem 
filldraw p; 
penlabels(0,1,2,3,4,5,6,9,10); endchar; 

cmchar "Rightward shift";  
beginchar(oct"037",9u#,asc_height#, 0); 
adjust_fit(0,0); pickup crisp.nib;  
p:=p reflectedabout((w/2+eps,-d),(w/2+eps,h)); 
filldraw p; 
penlabels(0,1,2,3,4,5,6,9); endchar; 
 
compute_spread(.45x_height#,.55x_height#); 
cmchar "Rightward squiggly arrow";  
beginchar(oct"040",18u#,v_center(spread# + 
rule_thickness#)); 
adjust_fit(0,0); pickup crisp.nib;  
pos1(rule_thickness,90); pos2(rule_thickness,90); 
pos3(bar,0); pos4(bar,0); y0=y1=y2=math_axis; 
x1-.5rule_thickness=hround 11u; rt x0=hround(w-u); 
y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0-3u-eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); 
z6l=z0; z9=.381966[.5[z3,z4],z0];  
numeric t; path p;  
p=z4l{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p;  
path p; 
p=z0..{z4-z9}z4r--subpath (0,t) of\\(z4l{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3l{z9-z3}..z5r) 
 --z3r{z9-z3}..z0 & cycle;  % arrowhead and stem 
filldraw p; 
%% now for squiggle              
x12-x11=x13-x12=x14-x13=x15-x14=x16-x15=x1-x16; 
x1-x11=hround (w-2u-x0+x1-.5rule_thickness); 
y11=y13=y15=y0; y12=y16=.5[y0,y3]; 
y14=.5[y4,y0];  
pickup pencircle scaled rule_thickness; 
draw z11---z12---z14---z16---z1; 
penlabels(0,1,2,3,4,5,6,9,11,12,13,14,15,16); endchar; 
 
compute_spread(.45x_height#,.55x_height#); 
cmchar "Leftward rightward squiggly arrow";  
beginchar(oct"041",25u#,v_center(spread# + 
rule_thickness#)); 
adjust_fit(0,0); pickup crisp.nib;  
arrow_length=4.5u+eps; 
pos1(rule_thickness,90); pos2(rule_thickness,90); 
pos3(bar,0); pos4(bar,0); y0=y1=y2=math_axis; 
x1+.5rule_thickness=hround(u+arrow_length);  
lft x0=hround u; y3-y0=y0-y4=.24asc_height+eps; 
x3=x4=x0+3u+eps; pos5(bar,angle(z4-z0)); z5l=z0; 
pos6(bar,angle(z3-z0)); z6l=z0; z9=.381966[.5[z3,z4],z0]; 
numeric t; path p; p=z4r{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p;  
path p; p=z0..{z4-z9}z4l--subpath (0,t) 
of\\(z4r{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and stem 
filldraw p; % left arrow 
p:=p reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
filldraw p; % right arrow  
z10=z1 reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
y11=y15=y19=.5[y0,y3]; y13=y17=.5[y4,y0]; 
y12=y14=y16=y18=y10; 
x11-x1=x12-x11=x13-x12=x14-x13=x15-x14=x16-x15=x17-x16=x18-x17= 
x19-x18=x10-x19; 
pickup pencircle scaled rule_thickness; 
draw z1---z11---z13---z15---z17---z19---z10; 
penlabels(0,1,2,3,4,5,6,9,10,11,12,13,14,15,16,17,18,19);  
endchar; 
 
cmchar "Leftward curly arrow";  
beginchar(oct"042",18u#,.8asc_height#,0#); 
adjust_fit(0,0); pickup crisp.nib;  
numeric arrow_length; arrow_length=.66*(w-2u+eps); 
pos1(rule_thickness,90); pos2(rule_thickness,90); 
pos3(bar,0); pos4(bar,0); y0=y1=y2=math_axis; 
x1+.5rule_thickness=hround(u+arrow_length);  
lft x0=hround u; y3-y0=y0-y4=.24asc_height+eps; 
x3=x4=x0+3u+eps; pos5(bar,angle(z4-z0)); z5l=z0; 
pos6(bar,angle(z3-z0)); z6l=z0; z9=.381966[.5[z3,z4],z0]; 
numeric t; path p; p=z4r{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p;  
path p; p=z0..{z4-z9}z4l--subpath (0,t) 
of\\(z4r{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and stem 
filldraw p; % left arrow 
z10=z1; x13=x14=hround(u+arrow_length+eps); y13=y1; y14=-o; 
x12=.5[x11,x13]; y12=h; rt x11=hround(w-u); y11=.5[y10,y12]; 
pickup pencircle scaled rule_thickness; 
path q; 
q=z10{right}..tension0.8..{up}z11..tension0.8..{left}z12 
..tension0.8..{down}z13--z14; 
draw q; 
penlabels(0,1,2,3,4,5,6,9,10,11,12,13,14); endchar; 
 
cmchar "Rightward curly arrow";  
beginchar(oct"043",18u#,.8asc_height#,0#); 
adjust_fit(0,0); pickup crisp.nib;  
p:=p reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
filldraw p; 
pickup pencircle scaled rule_thickness; 
q:=q reflectedabout ((w/2+eps,-d),(w/2+eps,h)); 
draw q; endchar; 
 
numeric circ_diam; % diameter of little circle 
circ_diam=2.5u; 
cmchar "Equals circle sign"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"044",14u#,v_center(4spread#+rule_thickness#+2.5u#)); 
italcorr h#*slant-.5u#; adjust_fit(0,0); pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1; y1=y2; y3=y4; 
y1-y3=spread; .5[y1,y3]=math_axis; draw z1--z2;  % upper bar 
draw z3--z4;  % lower bar % 
penpos11(rule_thickness,90); penpos13(rule_thickness,-90); 
penpos12(rule_thickness,180); penpos14(rule_thickness,0);  
x12r=hround(.5w-.5circ_diam-rule_thickness); % 
x14r=w-x12r; x11=x13=.5w; y11l=y13l+circ_diam; 
y12=y14=.5[y11,y13]; y13r=vround(y1+.8spread); % 
penstroke pulled_arc.e(11,12) & pulled_arc.e(12,13) 
 & pulled_arc.e(13,14) & pulled_arc.e(14,11) & cycle;  %  
penlabels(1,2,3,4,11,12,13,14); endchar; 
 


cmchar "Follows or equals sign";  
compute_spread(.45x_height#,.55x_height#);  
spread#':=spread#; spread':=spread;         % spread of similarity sign 
compute_spread(.54 x_height#,.66 x_height#); 
spread#'':=spread#; spread'':=spread;       % spread between symbols
compute_spread(5/4 x_height#,3/2 x_height#); % spread of follows sign
beginchar(oct"045",14u#,v_center(spread#'+spread#+spread#'')); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x1=hround 1.5u-eps; x1=x3; x2=w-x1; 
y1-y3=spread; y2=.5[y1,y3]; top y1=h; 
draw z1{u,-spread}...{right}z2; %upper `diagonal' 
draw z3{u,spread}...{right}z2; % lower diagonal 
pickup pencircle xscaled .7rule_thickness yscaled 
1.4rule_thickness; 
if vair#>.8curve#: pickup rule.nib; autorounded; fi 
lft x11=hround u; x12=4u; x13=w-x12; x14=w-x11; 
bot y11=bot y13; top y12=top y14;  
top y12-bot y11=spread'';  
y3-y14=spread'; 
draw z11{up}...z12{right}..{right}z13...{up}z14; 
penlabels(1,2,3,11,12,13,14); endchar; 
 
cmchar "Greater than or similar to sign";  
compute_spread(.45x_height#,.55x_height#);  
spread#':=spread#; spread':=spread; 
compute_spread(.54x_height#,.66x_height#);
spread#'':=spread#; spread'':=spread;
compute_spread(5/4 x_height#,3/2 x_height#); 
beginchar(oct"046",14u#,v_center(spread#'+spread#+spread#'')); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x1=hround 1.5u-eps; x1=x3; x2=w-x1; 
y1-y3=spread; y2=.5[y1,y3]; top y1=h; 
draw z1--z2--z3; 
pickup pencircle xscaled .7rule_thickness yscaled 
1.4rule_thickness; 
if vair#>.8curve#: pickup rule.nib; autorounded; fi 
lft x11=hround u; x12=4u; x13=w-x12; x14=w-x11; 
bot y11=bot y13; top y12=top y14;  
top y12-bot y11=spread'';
 y3-y14=spread'; 
draw z11{up}...z12{right}..{right}z13...{up}z14; 
penlabels(1,2,3,4,11,12,13,14); endchar; 
  
cmchar "Greater than or approximately equal to sign";  
compute_spread(.45x_height#,.55x_height#);  
spread#':=spread#; spread':=spread; 
compute_spread(.54x_height#,.66x_height#);
spread#'':=spread#; spread'':=spread;    % spread between similarities
compute_spread(1.111 x_height#,1.333 x_height#); 
beginchar(oct"047",14u#,v_center(spread#+2spread#''+2rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x1=hround 1.5u-eps; x1=x3; x2=w-x1; 
y1-y3=spread; y2=.5[y1,y3]; top y1=h;
draw z1--z2--z3; 
pickup pencircle xscaled .7rule_thickness yscaled 
1.4rule_thickness; 
if vair#>.8curve#: pickup rule.nib; autorounded; fi 
lft x11=hround u; x12=4u; x13=w-x12; x14=w-x11; 
bot y11=bot y13; top y12=top y14;  
top y12-bot y11=spread'; 
bot y3- top y13 = spread''; 
path p; p=z11{up}...z12{right}..{right}z13...{up}z14; 
draw p; draw p shifted (0,-spread''); 
penlabels(1,2,3,4,11,12,13,14); endchar; 
        
cmchar "Multimap symbol";  
beginchar(oct"050",20u#,.8asc_height#,0#);  
adjust_fit(0,0); pickup rule.nib; autorounded; 
numeric circ_diam; circ_diam=5u; 
y2=math_axis; y8=y2+.5circ_diam; rt x2=w-u;  
x6=x2-circ_diam;  
circle_points; draw_circle; 
x9=u+.5rule_thickness; y9=y10=y2; x10=x6-.5rule_thickness; 
draw z9---z10; 
penlabels(1,2,3,4,5,6,7,8,9,10); endchar; 
 
cmchar "Therefore"; 
beginchar(oct"051",12u#,asc_height#,0); 
adjust_fit(0,0); 
lft x1=hround 1.5u; x2=w-x1; bot y1=-o; y2=y1; 
z3-z1=(z2-z1)rotated60;
fill fullcircle scaled dot_size shifted z1;  
% left bottom dot                   
fill fullcircle scaled dot_size shifted z2;  
% rigth bottom 
fill fullcircle scaled dot_size shifted z3; % top dot 
penlabels(1,2,3); endchar; 
 
 
cmchar "Because"; 
beginchar(oct"052",12u#,asc_height#,0); 
adjust_fit(0,0); 
lft x1=hround 1.5u; x2=w-x1; y2=y1; 
x3=w/2; y3=-o;
z3-z1=(z2-z1)rotated-60;
fill fullcircle scaled dot_size shifted z1; % top left dot 
fill fullcircle scaled dot_size shifted z2;  
% top right dot 
fill fullcircle scaled dot_size shifted z3; % bottom dot 
penlabels(1,2,3); endchar; 
 
cmchar "Equals-and-dots sign";  
beginarithchar(oct"053");  
compute_spread(.45x_height#,.55x_height#); 
pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1; 
y1=y2; y3=y4; y1-y3=spread; .5[y1,y3]=math_axis; 
draw z1--z2; draw z3--z4; % draw bars 
pickup light_rule.nib; 
x5=x6=x7=x8=hround w/2+eps; z5=z6; z7=z8; 
penpos5(.8dot_size,0); penpos6(.8dot_size,90); 
penpos7(.8dot_size,0); penpos8(.8dot_size,90); 
y5-y1=y3-y7=spread; 
dot(5,6); dot(7,8); % draw dots 
penlabels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Equals sign with triangle";  
beginchar(oct"054", 14u#,12u#+math_axis# ,6u#-math_axis#);  
compute_spread(.45x_height#,.55x_height#); 
pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1; 
y1=y2; y3=y4; y1-y3=spread; .5[y1,y3]=math_axis; 
draw z1--z2; draw z3--z4; % draw bars 
numeric tri_side; % length of equilateral triangle 
tri_side=7u; 
x6-x5=tri_side; .5[x5,x6]=w/2; y5=y6; y5-y1=.8spread;
%top y7=body_height;x7=w/2; 
z7-z5=(z6-z5) rotated 60; 
draw z5--z6--z7--cycle; 
penlabels(1,2,3,4,5,6,7); endchar; 
 

cmchar "Precedes or equals sign";  
compute_spread(.45x_height#,.55x_height#);  
spread#':=spread#; spread':=spread; 
compute_spread(.54x_height#,.55x_height#);
spread#'':=spread#; spread'':=spread;
compute_spread(5/4 x_height#,3/2 x_height#); 
beginchar(oct"055",14u#,v_center(spread#'+spread#+spread#'')); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x2=hround 1.5u-eps; x1=x3=w-x2;  
y1-y3=spread; y2=.5[y1,y3]; top y1=h; 
draw z1{-u,-spread}...{left}z2; %upper `diagonal' 
draw z3{-u,spread}...{left}z2; % lower diagonal 
pickup pencircle xscaled .7rule_thickness yscaled 
1.4rule_thickness; 
if vair#>.8curve#: pickup rule.nib; autorounded; fi 
lft x11=hround u; x12=4u; x13=w-x12; x14=w-x11; 
bot y11=bot y13; top y12=top y14;  
top y12-bot y11=spread'';  
 y3-y14=spread'; 
draw z11{up}...z12{right}..{right}z13...{up}z14; 
penlabels(1,2,3,11,12,13,14); endchar; 
  
cmchar "Less than or similar to sign";  
compute_spread(.45x_height#,.55x_height#);  
spread#':=spread#; spread':=spread; 
compute_spread(.54x_height#,.55x_height#);
spread#'':=spread#; spread'':=spread;
compute_spread(5/4 x_height#,3/2 x_height#); 
beginchar(oct"056",14u#,v_center(spread#'+spread#+spread#'')); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x2=hround 1.5u-eps; x1=x3=w-x2; 
y1-y3=spread; y2=.5[y1,y3]; top y1=h; 
draw z1--z2--z3; 
pickup pencircle xscaled .7rule_thickness yscaled 
1.4rule_thickness; 
if vair#>.8curve#: pickup rule.nib; autorounded; fi 
lft x11=hround u; x12=4u; x13=w-x12; x14=w-x11; 
bot y11=bot y13; top y12=top y14;  
top y12-bot y11=spread'';  
 y3-y14=spread'; 
draw z11{up}...z12{right}..{right}z13...{up}z14; 
penlabels(1,2,3,4,11,12,13,14); endchar; 

cmchar "Less than or approximately equal to sign";  
compute_spread(.45x_height#,.55x_height#);  
spread#':=spread#; spread':=spread; 
compute_spread(.54x_height#,.66x_height#);
spread#'':=spread#; spread'':=spread;    % spread between similarities
compute_spread(1.111 x_height#,1.333 x_height#); 
beginchar(oct"057",14u#,v_center(spread#+2spread#''+2rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x2=hround 1.5u-eps; x1=x3=w-x2; 
y1-y3=spread; y2=.5[y1,y3]; top y1=h; 
draw z1--z2--z3; 
pickup pencircle xscaled .7rule_thickness yscaled 
1.4rule_thickness; 
if vair#>.8curve#: pickup rule.nib; autorounded; fi 
lft x11=hround u; x12=4u; x13=w-x12; x14=w-x11; 
bot y11=bot y13; top y12=top y14;  
top y12-bot y11=spread';
bot y3- top y13 = spread''; 
path p; p=z11{up}...z12{right}..{right}z13...{up}z14; 
draw p; draw p shifted (0,-spread''); 
penlabels(1,2,3,4,11,12,13,14); endchar; 
    
cmchar "Equal or less than sign";  
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#);  
beginchar(oct"060",14u#,v_center(spread#'+spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
lft x2=hround 1.5u-eps; x1=x3=w-x2; y1-y3=spread; 
y2=.5[y1,y3]; y8-y1=y9-y2=spread'; top y8=h; 
x2=x9; x1=x8; 
draw z1--z2--z3;  % diagonals  
draw z8--z9; % equal sign 
penlabels(1,2,3,8,9); endchar; 

cmchar "Equal or greater than sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"061",14u#,v_center(spread#'+spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
rt x2=hround(w-1.5u)+eps; x1=x3=w-x2; y1-y3=spread;  
x2=x9; x1=x8; 
y2=.5[y1,y3]; y8-y1=y9-y2=spread'; top y8=h; 
draw z1--z2--z3;  % diagonals 
draw z8--z9; 
penlabels(1,2,3,8,9); endchar;  
 
cmchar "Less than or (slanted) equal sign";  
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#);  
beginchar(oct"066",14u#,v_center(spread#'+spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
lft x2=hround 1.5u-eps; x1=x3=w-x2; y1-y3=spread; 
y2=.5[y1,y3]; y3-y8=y2-y9=spread'; top y1=h; 
x2=x9; x1=x8; 
draw z1--z2--z3;  % diagonals  
draw z8--z9; % equal sign 
penlabels(1,2,3,8,9); endchar; 

cmchar "Greater than or (slanted) equal sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"076",14u#,v_center(spread#'+spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
rt x2=hround(w-1.5u)+eps; x1=x3=w-x2; y1-y3=spread;  
x2=x9; x1=x8; 
y2=.5[y1,y3]; y3-y8=y2-y9=spread'; top y1=h; 
draw z1--z2--z3;  % diagonals 
draw z8--z9; 
penlabels(1,2,3,8,9); endchar;  
cmchar "Less than or greater than sign";  
compute_spread(.4x_height#,.5x_height#);  
spread#':=spread#; spread':=spread; 
compute_spread(1.111 x_height#,1.333 x_height#); 
beginchar(oct"067",14u#,v_center(2spread#'+spread#+rule_thickness#));
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x1=hround w-1.5u+eps; x1=x3=x5; x2=x4=x6=w-x1; 
y1-y3=spread; top y1=h; y2-y4=spread'; y4-y6=spread; 
y2=.5[y1,y3]; y5=.5[y4,y6]; 
draw z1--z2--z3; draw z4--z5--z6; 
penlabels(1,2,3,4,5,6); endchar; 
 
cmchar "Greater than or less than sign";  
compute_spread(.4x_height#,.5x_height#);  
spread#':=spread#; spread':=spread; 
compute_spread(1.111 x_height#,1.333x_height#); 
beginchar(oct"077",14u#,v_center(2spread#'+spread#+rule_thickness#));
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x1=hround 1.5u-eps; x1=x3=x5; x2=x4=x6=w-x1; 
y1-y3=spread; top y1=h; y2-y4=spread'; y4-y6=spread; 
y2=.5[y1,y3]; y5=.5[y4,y6]; 
draw z1--z2--z3; draw z4--z5--z6; 
penlabels(1,2,3,4,5,6); endchar; 
 
cmchar "Equals or precedes sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"062",14u#,v_center(spread#'+spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
lft x2=hround(1.5u)+eps; x1=x3=w-x2; y1-y3=spread; 
y2=.5[y1,y3]; top y8-bot y1=top y9-bot y2=spread'; bot y3=0; 
x2=x9;x8=x1-2u; 
draw z1{-u,-spread}...{left}z2; 
draw z3{-u, spread}...{left}z2; 
draw z8{-u,-spread}...{left}z9; 
penlabels(1,2,3,8,9); endchar; 
 
cmchar "Equals or follows sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"063",14u#,v_center(spread#'+spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
rt x2=hround(w-1.5u)+eps; x1=x3=w-x2; y1-y3=spread; 
y2=.5[y1,y3]; top y8-bot y1=top y9-bot y2=spread'; bot y3=0;% top y8=h; 
x2=x9;x8=x1+2u;  
draw z1{u,-spread}...{right}z2; 
draw z3{u, spread}...{right}z2; 
draw z8{u,-spread}...{right}z9; 
penlabels(1,2,3,8,9); endchar; 
 
cmchar "Precedes or curvy equals sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"064",14u#,v_center(spread#'+spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
lft x2=hround(1.5u)+eps; x1=x3=w-x2; y1-y3=spread; 
y2=.5[y1,y3]; top y3-bot y8=top y2-bot y9=spread'; bot y3=0;
x2=x9;x8=x1-2u; 
%for i=1 upto 3: %lower entire character
%y[i]:=y[i]-spread'; endfor
%for i=8 upto 9:
%y[i]:=y[i]-spread'; endfor
draw z1{-u,-spread}...{left}z2; 
draw z3{-u, spread}...{left}z2; 
draw z8{-u, spread}...{left}z9; 
penlabels(1,2,3,8,9); endchar; 
 
cmchar "Follows or curvy equals sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"074",14u#,v_center(spread#'+spread#+rule_thickness#));
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
rt x2=hround(w-1.5u)+eps; x1=x3=w-x2; y1-y3=spread; 
y2=.5[y1,y3]; top y3-bot y8=top y2-bot y9=spread'; bot y3=0; 
x2=x9;x8=x1+2u; 
%for i=1 upto 3: %lower entire character
%y[i]:=y[i]-spread'; endfor
%for i=8 upto 9:
%y[i]:=y[i]-spread'; endfor
draw z1{u,-spread}...{right}z2; 
draw z3{u, spread}...{right}z2; 
draw z8{u, spread}...{right}z9; 
penlabels(1,2,3,8,9); endchar; 
 
cmchar "Less than or (double) equals sign";  
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#);  
beginchar(oct"065",14u#,v_center(2spread#'+spread#+2rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
lft x2=hround 1.5u-eps; x1=x3=w-x2; y1-y3=spread; 
y2=.5[y1,y3]; top y1=h; 
x2=x9=x7; x1=x8=x6; y7=y6; y8=y9; 
y7-y9=spread'; top y3-bot y6=spread'; 
draw z1--z2--z3;  % diagonals  
draw z6--z7; draw z8--z9; % equal sign 
penlabels(1,2,3,6,7,8,9); endchar; 

cmchar "Greater than or (double) equals sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"075",14u#,v_center(2spread#'+spread#+2rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib;  
rt x2=hround(w-1.5u)+eps; x1=x3=w-x2; y1-y3=spread;  
x2=x7=x9; x1=x6=x8; y6=y7; y8=y9; 
y2=.5[y1,y3]; top y3-bot y6=spread'; top y1=h; 
y7-y9=spread'; 
draw z1--z2--z3;  % diagonals 
draw z6--z7; draw z8--z9; 
penlabels(1,2,3,6,7,8,9); endchar;  
 
cmchar "Reverse prime symbol (superscript only)"; 
beginchar(oct"070",3u#+max(1.75u#,curve#+2(curve#-stem#)), 
 .8asc_height#,0); adjust_fit(0,0); pickup fine.nib; numeric 
light_stem,heavy_stem; light_stem=hround .5[vair,stem]; 
heavy_stem=hround(bold+2dw); x1-.5heavy_stem=hround(.25u); 
y1+.5heavy_stem=h; x2+.5light_stem=hround (w-.5u); 
y2=1/12asc_height;  
numeric theta; theta=angle(z1-z2)-90; 
pos1(heavy_stem,theta); pos2(light_stem,theta);  
filldraw circ_stroke z1e--z2e;  % diagonal  
penlabels(1,2); endchar; 

cmchar "short axis line";
beginchar(oct"071",9u#,27/7u#+math_axis#,27/7u#-math_axis#); pickup rule.nib;
lft x1=hround 1.5u-eps; x2=w-x1; y1=y2=math_axis;
draw z1--z2;
labels(1,2); endchar;
 
cmchar "Dotted (right-left) equals sign"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"072",14u#,v_center(3spread#+2rule_thickness#)); 
italcorr h#*slant-.5u#; adjust_fit(0,0); pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1; y1=y2; y3=y4; 
y1-y3=spread; .5[y1,y3]=math_axis; draw z1--z2;  % upper bar 
draw z3--z4;  % lower bar 
pickup tiny.nib; 
x6=x5=x2; y6=y5=y1+spread; 
pos5(dot_size,0); pos6(dot_size,90); 
x7=x8=x3; y7=y8=y4-spread; 
pos7(dot_size,0); pos8(dot_size,90); 
dot(5,6); dot(7,8); 
penlabels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Dotted (left-right) equals sign"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"073",14u#,v_center(3spread#+2rule_thickness#)); 
italcorr h#*slant-.5u#; adjust_fit(0,0); pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1; y1=y2; y3=y4; 
y1-y3=spread; .5[y1,y3]=math_axis;  
draw z1--z2;  % upper bar  
draw z3--z4;  % lower bar  
pickup tiny.nib; 
x6=x5=x1; y6=y5=y1+spread; 
pos5(dot_size,0); pos6(dot_size,90); 
x7=x8=x4; y7=y8=y4-spread; 
pos7(dot_size,0); pos8(dot_size,90); 
dot(5,6); dot(7,8); 
penlabels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Square subset sign"; % taken from vol E, p533
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"100",14u#,v_center(spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; lft x2=hround(1.5u); 
x1=x4=hround(w-x2)+eps; x3=x2; y1-y4=spread; y2=y1; y3=y4; 
top y1=h; draw z1--z2--z3--z4;  % bars and stem x8=x1; 
penlabels(1,2,3,4); endchar; 
 
cmchar "Square superset sign"; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"101",14u#,v_center(spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib;  
x2=hround(w-1.5u); x1=x4=hround w-x2-eps; x3=x2; 
y1-y4=spread; y2=y1; y3=y4; top y1=h; draw z1--z2--z3--z4;  
% bars and stem  
penlabels(1,2,3,4); endchar; 
 
cmchar "Rightward pointing isosceles triangle"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"102",14u#,v_center(spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; lft x2=hround(1.5u); 
x3=x2; x1=hround(w-x2);   
top y2=h; y2-y3=spread; y1=.5[y2,y3]; 
draw z1--z2--z3--cycle;  
penlabels(1,2,3); endchar;  
 
cmchar "Leftward pointing isosceles triangle"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"103",14u#,v_center(spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; rt x2=hround(w-1.5u-eps); 
x3=x2; x1=hround(w-x2);   
top y2=h; y2-y3=spread; y1=.5[y2,y3]; 
draw z1--z2--z3--cycle;  
penlabels(1,2,3); endchar;  
 
cmchar "Rightward isosceles triangle with lower bar"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"104",14u#,v_center(spread#'+spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; lft x2=hround(1.5u); 
x3=x2; x1=hround(w-x2);   
top y2=h; y2-y3=spread; y1=.5[y2,y3]; 
x4=x2; x5=x1; y3-y4=spread'; y5=y4; 
draw z1--z2--z3--cycle; draw z4--z5; 
penlabels(1,2,3,4,5); endchar;  
 
cmchar "Leftward isosceles triangle with lower bar"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"105",14u#,v_center(spread#'+spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; rt x2=hround(w-1.5u-eps); 
x3=x2; x1=hround(w-x2);   
top y2=h; y2-y3=spread; y1=.5[y2,y3]; 
x4=x2; x5=x1; y3-y4=spread'; y5=y4; 
draw z1--z2--z3--cycle; draw z4--z5; 
penlabels(1,2,3,4,5); endchar;  
 
cmchar "Large, filled, 5-pointed star"; 
beginchar(oct"106",asc_height#+desc_depth#,asc_height#,desc_depth#); 
adjust_fit(.5u#, .5u#); pickup tiny.nib; 
numeric theta; theta=360/5; 
x0=good.x .5w; y0=good.y .5[h, -d]; x1=x0; top y1=h; 
for n=2 upto 5: z[n]=z0+(z1-z0) rotated((n-1)*theta); endfor 
% z0 is the `origin' 
% z1 thru z5 are the points; z1 at the top going 
%  counterclockwise 
z6=(z1--z3)intersectionpoint(z2--z5); 
for n=7 upto10: z[n]=z0+(z6-z0)rotated((n-1)*theta); endfor 
filldraw z1--z6--z2--z7--z3--z8--z4--z9--z5--z10--cycle; 
penlabels(0,1,2,3,4,5); endchar; 
 
cmchar "Vertical overlapping slurs"; 
beginchar(oct"107",9u#,body_height#,paren_depth#); 
adjust_fit(0,0); pickup fine.nib; 
numeric light_stem; light_stem=Vround .5[vair,stem]; 
y2=.5[h,-d]; x2r=hround w-1.5u; pos2(light_stem,0); 
x1-.5hair=hround w-x2; x3=x1; y1+.5hair=h; y3-.5hair=-d; 
numeric theta;  theta= angle((z2-z1)xscaled3); 
numeric theta'; theta'=angle((z3-z2)xscaled3); 
pos1(hair, theta+90); pos3(hair, theta'+90); 
path p; 
p=z1l{dir theta}...z2l...{dir theta'}z3l 
  ..z3r{-dir theta'}...z2r...{-dir theta}z1r..cycle; 
filldraw p; 
p:=p reflectedabout((.5w,-d),(.5w,h)); filldraw p; 
penlabels(1,2,3); endchar; 
 
cmchar "Filled rightward pointing isosceles triangle"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"111",14u#,v_center(spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; lft x2=hround(1.5u); 
x3=x2; x1=hround(w-x2);   
top y2=h; y2-y3=spread; y1=.5[y2,y3]; 
filldraw z1--z2--z3--cycle;  
penlabels(1,2,3); endchar;  
 
cmchar "Filled leftward pointing isosceles triangle"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"112",14u#,v_center(spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; rt x2=hround(w-1.5u-eps); 
x3=x2; x1=hround(w-x2);   
top y2=h; y2-y3=spread; y1=.5[y2,y3]; 
filldraw z1--z2--z3--cycle;  
penlabels(1,2,3); endchar;  
 
 cmchar "short axis right arrow";
beginchar(oct"113",9u#,27/7u#+math_axis#,27/7u#-math_axis#); 
pickup rule.nib;
penpos1(.25rule_thickness,90); penpos2(.25rule_thickness,90); penpos3(bar,0); 
penpos4(bar,0);
y0=y1=y2=math_axis; 
x1=hround 1.5u-eps;
rt x0=w-x1;
y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0-3u-eps;
penpos5(bar,angle(z4-z0)); z5l=z0; penpos6(bar,angle(z3-z0)); z6l=z0;
z9=.381966[.5[z3,z4],z0];
numeric t; path p; p=z4l{z9-z4}..z6r;
t=xpart(p intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p;
filldraw z0..{z4-z9}z4r--subpath (0,t) of\\(z4l{z9-z4}..z6r)
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3l{z9-z3}..z5r)
 --z3r{z9-z3}..z0 & cycle;     % arrowhead and stem
penlabels(0,1,2,3,4,5,6,9); endchar;

cmchar "short axis left arrow";
beginchar(oct"114",9u#,27/7u#+math_axis#,27/7u#-math_axis#); 
pickup rule.nib;
penpos1(.25rule_thickness,90); penpos2(.25rule_thickness,90); penpos3(bar,0); 
penpos4(bar,0);
y0=y1=y2=math_axis; x0=hround 1.5u-eps;
rt x1=w-x0;
y3-y0=y0-y4=.24asc_height+eps; x3=x4=x0+3u+eps;
penpos5(bar,angle(z4-z0)); z5l=z0; penpos6(bar,angle(z3-z0)); z6l=z0;
z9=.381966[.5[z3,z4],z0];
numeric t; path p; p=z4r{z9-z4}..z6r;
t=xpart(p intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p;
filldraw z0..{z4-z9}z4l--subpath (0,t) of\\(z4r{z9-z4}..z6r)
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r)
 --z3l{z9-z3}..z0 & cycle;     % arrowhead and stem
penlabels(0,1,2,3,4,5,6,9); endchar;


cmchar "Filled downward triangle"; 
beginchar(oct"110",.8asc_height#+3u#,.8asc_height#,0pt#); 
adjust_fit(0,0); pickup rule.nib; 
y2=0; lft x1=1.5u;  
x3=hround w-x1; 
y1=y3=vround h-y2; x2=.5[x1,x3]; 
filldraw z1--z2--z3--cycle; 
penlabels(1,2,3); endchar; 
 
cmchar "Downward triangle"; 
beginchar(oct"117",.8asc_height#+3u#,.8asc_height#,0pt#); 
adjust_fit(0,0); pickup rule.nib; 
y2=0; lft x1=1.5u;  
x3=hround w-x1; 
y1=y3=vround h-y2; x2=.5[x1,x3]; 
draw z1--z2--z3--cycle; 
penlabels(1,2,3); endchar; 
 
cmchar "Upward triangle"; 
beginchar(oct"115",.8asc_height#+3u#,.8asc_height#,0pt#); 
adjust_fit(0,0); pickup rule.nib; 
y2=h; lft x1=1.5u;  
x3=hround w-x1; 
y1=y3=vround h-y2; x2=.5[x1,x3]; 
draw z1--z2--z3--cycle; 
penlabels(1,2,3); endchar; 
 
cmchar "Filled upward triangle"; 
beginchar(oct"116",.8asc_height#+3u#,.8asc_height#,0pt#); 
adjust_fit(0,0); pickup rule.nib; 
y2=h; lft x1=1.5u;  
x3=hround w-x1; 
y1=y3=vround h-y2; x2=.5[x1,x3]; 
filldraw z1--z2--z3--cycle; 
penlabels(1,2,3); endchar; 
 
cmchar "Egg sandwich"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"120",14u#,asc_height#,0); 
italcorr h#*slant-.5u#; adjust_fit(0,0); pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1;  
y1=y2; y3=y4;  
y1-y3=spread;  
.5[y1,y3]=math_axis;  
draw z1--z2;  % upper bar  
draw z3--z4;  % lower bar  
pickup tiny.nib; 
x5=x6=hround w/2; bot y5=bot y1; top y6=top y3; 
y7=y8=math_axis;x8-x7=y5-y6; 
x6=.5[x7,x8]; 
draw z5{right}..z8..z6{left}..z7..cycle; 
penlabels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Stacked symbols: <, bar, >"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(.98 x_height#,1.176 x_height#); 
beginchar(oct"121",14u#,v_center(2spread#'+2spread#+rule_thickness#));
adjust_fit(0,0); pickup rule.nib; 
y1=y2; lft x1=hround 1.5u-eps; rt x2=w-x1; 
x4=x6=x8=x1; x3=x5=x7=x2; 
y5-y1=y1-y6=spread';top y3=h; y3-y5=spread; 
y6-y8=spread;
y7=.5[y6,y8]; y4=.5[y3,y5]; 
draw z3--z4--z5; draw z6--z7--z8; draw z1--z2;
penlabels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Stacked symbls: greater than, bar, less than"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(.98 x_height#,1.176 x_height#); 
beginchar(oct"122",14u#,v_center(2spread#'+2spread#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; 
y1=y2; lft x2=hround 1.5u-eps; rt x1=w-x2; 
x4=x6=x8=x1; x3=x5=x7=x2; 
y5-y1=y1-y6=spread';top y3=h; y3-y5=spread; 
y6-y8=spread;
y7=.5[y6,y8]; y4=.5[y3,y5]; 
draw z3--z4--z5; draw z6--z7--z8; draw z1--z2;
numeric bar_ht; bar_ht=y1; %save height of bar
penlabels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Stacked symbls: less than, =, greater than"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(.98 x_height#,1.176 x_height#); 
beginchar(oct"123",14u#,v_center(3spread#'+2spread#+rule_thickness#));
adjust_fit(0,0); pickup rule.nib; autorounded;
lft x1=hround 1.5u-eps; x2=w-x1; 
x1'=x1; x2=x2'; x4=x6=x8=x1;
x3=x5=x7=x2;                
y1=y2; y1'=y2'; y2-y2'=spread'; bot y2=math_axis+.5spread';
draw z1--z2; draw z1'--z2'; 
y3-y5=y6-y8=spread;
y5-y2=y2'-y6=spread';
y7=.5[y6,y8]; y4=.5[y3,y5]; 
draw z3--z4--z5; draw z6--z7--z8; 
penlabels(1,1',2,2',3,4,5,6,7,8); endchar; 

cmchar "Stacked symbols: greater than, =, less than"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; 
compute_spread(.98 x_height#,1.176 x_height#); 
beginchar(oct"124",14u#,v_center(3spread#'+2spread#+rule_thickness#));
adjust_fit(0,0); pickup rule.nib; 
lft x2=hround 1.5u-eps; x1=w-x2; 
x1'=x1; x2=x2'; x4=x6=x8=x1;
x3=x5=x7=x2; 
y1=y2; y1'=y2'; y2-y2'=spread'; bot y2=math_axis+.5spread';
draw z1--z2; draw z1'--z2'; 
y3-y5=y6-y8=spread;
y5-y2=y2'-y6=spread';
y7=.5[y6,y8]; y4=.5[y3,y5]; 
draw z3--z4--z5; draw z6--z7--z8; 
penlabels(1,1',2,2',3,4,5,6,7,8); endchar; 

cmchar "Triple rightward arrow"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"126",18u#,v_center(2spread#+.5asc_height#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; penpos1(rule_thickness,90); 
penpos2(rule_thickness,90); penpos3(1.5bar,0); penpos4(1.5bar,0); 
y0=y1=y2=math_axis; x1-.5rule_thickness=u;  
rt x0=hround (w-u); x0'=x0''=x0; x1'=x1''=x1; 
y1'=y1+spread;y1''=y1-spread; y0'=y1'; y0''=y1''; 
draw z0'--z1'; draw z0''--z1''; % draw bars  
pickup crisp.nib;  
y3-y0'=y0''-y4=.24asc_height+eps; x3=x4=x0-6u-eps; 
penpos5(bar,angle(z0-z4)); z5r=z0; penpos6(bar,angle(z0-z3)); 
z6r=z0; z9=.381966[.5[z3,z4],z0]; erase filldraw 
z0..{z3-z9}z3--(w,y3)--(w,y4)--z4{z9-z4}..z0& cycle; 
numeric t; path p; 
p=z4l{z9-z4}..z6l; t=xpart(p intersectiontimes((0,y2l)--(w,y2l))); 
x2=xpart point t of p; 
filldraw z0..{z4-z9}z4r--subpath (0,t) of\\(z4l{z9-z4}..z6l) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3l{z9-z3}..z5l) 
 --z3r{z9-z3}..z0 & cycle;  % arrowhead and stem 
penlabels(0,1,2,3,4,5,6,9,0',0'',1',1''); endchar; 


cmchar "Triple leftward arrow"; 
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"127",18u#,v_center(2spread#+.5asc_height#+rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; penpos1(rule_thickness,90); 
penpos2(rule_thickness,90); penpos3(1.5bar,0); penpos4(1.5bar,0); 
y0=y1=y2=math_axis; x1+.5rule_thickness=hround(w-u); lft 
x0=hround u; x0'=x0''=x0; x1'=x1''=x1; 
y1'=y1+spread;y1''=y1-spread; y0'=y1'; y0''=y1''; draw 
z0'--z1'; draw z0''--z1''; % draw bars  
pickup crisp.nib;  
y3-y0'=y0''-y4=.24asc_height+eps; x3=x4=x0+6u+eps; 
pos5(bar,angle(z4-z0)); z5l=z0; pos6(bar,angle(z3-z0)); 
z6l=z0; z9=.381966[.5[z3,z4],z0]; erase filldraw 
z0..{z3-z9}z3--(0,y3) 
 --(0,y4)--z4{z9-z4}..z0& cycle; numeric t; path p; 
p=z4r{z9-z4}..z6r; t=xpart(p 
intersectiontimes((0,y2l)--(w,y2l))); x2=xpart point t of p; 
filldraw z0..{z4-z9}z4l--subpath (0,t) of\\(z4r{z9-z4}..z6r) 
 --z2l---z1l..z1r---z2r--subpath (t,0) of\\(z3r{z9-z3}..z5r) 
 --z3l{z9-z3}..z0 & cycle;  % arrowhead and stem 
penlabels(0,1,2,3,4,5,6,9,0',0'',1',1''); endchar; 

cmchar "Check mark"; beginchar(oct"130",15u#,asc_height#, 
0); adjust_fit(0,0); pickup cal.nib;  
lft x1=hround(1.5u);y1=math_axis; y2=0; x2=hround(w/3); 
x3=w-x1; y3=asc_height-o;  
x4=w-1.5x2; y4=asc_height; 
draw z1--z2{z4-z2}..z3; 
penlabels(1,2,3,4);  
endchar; 

cmchar "Vee on bar";  
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"131",11u#,asc_height#, desc_depth#); 
adjust_fit(0,0); pickup rule.nib;  
lft x1=lft x4=hround u; x3=x5=w-x1; x2=hround(w/2); 
bot y4=bot y5=0; y2=y4+spread; top y1=top y3=h+o; 
draw z1--z2--z3; draw z4--z5; 
penlabels(1,2,3,4,5);  
endchar; 

cmchar "Bar on mountain";  
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"132",11u#,asc_height#, desc_depth#); adjust_fit(0,0); 
pickup rule.nib;  
lft x1=lft x4=hround u; x3=x5=w-x1; x2=hround(w/2); 
top y4=top y5=h+o; y2=y4-spread; bot y1=bot y3=0; 
draw z1--z2--z3; draw z4--z5; 
numeric t; % t is used in char"133, = on mountain 
t=y2-y3; 
penlabels(1,2,3,4,5);  
endchar; 

cmchar "Equal sign on mountain";  
compute_spread(.45x_height#,.55x_height#); 
beginchar(oct"133",11u#,body_height#, desc_depth#); adjust_fit(0,0); 
pickup rule.nib;  
lft x1=lft x4=lft x6=hround u; x3=x5=x7=w-x1; x2=hround(w/2);  
y4=y5; y6=y7; y6-y4=y4-y2=spread; top y4=asc_height+o-.5spread; 
y2-y1=t; % t is defined in char "132
y1=y3; 
draw z1--z2--z3; draw z4--z5; draw z6--z7; 
penlabels(1,2,3,4,5,6,7);  
endchar; 

cmchar "Angle sign (simple)";  
beginchar(oct"134",13u#,asc_height#, 0); 
adjust_fit(0,0); pickup rule.nib;  
lft x2=hround u; x1=x3=w-x2;  
bot y2=bot y3=0; top y1=h; 
draw z1--z2--z3; 
penlabels(1,2,3);  
endchar; 

cmchar "Angle sign (with small arc)";  
beginchar(oct"135",13u#,asc_height#, 0); 
adjust_fit(0,0); pickup rule.nib;  
lft x2=hround u; x1=x3=w-x2;  
bot y2=bot y3=0; y1=h; 
draw z1--z2--z3; 
path p; p=quartercircle scaled 15u; 
numeric t; t= xpart(p intersectiontimes (z1--z2)); 
draw subpath (0,t) of p; 
penlabels(1,2,3);  
endchar; 

cmchar "Eye-like angle sign (with small arc)";  
beginchar(oct"136",13u#,v_center(.75body_height#)); 
adjust_fit(0,0); pickup rule.nib;  
lft x2=hround u; x1=x3=w-x2;  
y2=math_axis; y2=.5[y1,y3]; y1-y3=.75body_height; 
draw z1--z2--z3; 
path p; p=quartercircle scaled 17u; 
numeric t; t= xpart(p intersectiontimes ((z1--z2)shifted 
-z2)); 
draw subpath (0,t) of p shifted z2; 
draw subpath (0,t) of p shifted z2 
reflectedabout(z2,(w,y2)); 
penlabels(1,2,3);  
endchar; 

cmchar "Proportional sign made of circles";  
beginchar(oct"137",14u#,asc_height#,0); 
adjust_fit(0,0); pickup pencircle scaled rule_thickness;  
numeric radius; radius:=w-2u; radius:=radius/3; 
radius:=radius-.5rule_thickness; 
x2=hround w-u; x1=w-x2+radius; 
y1=y2=math_axis; 
pair m; m=(rule_thickness,0); 
draw fullcircle scaled 2radius shifted (z1+.5m); 
draw (halfcircle scaled 2radius rotated 90) shifted 
(z2-.5m); 
penlabels(1,2);  
endchar; 

cmchar "Simple slur below (smile)"; 
beginchar(oct"140",14u#,asc_height#,desc_depth#); 
adjust_fit(0,0); pickup rule.nib;  
lft x1=hround u; y1=vround(math_axis+.25x_height);  
x3=w-x1; y3=y1; penpos2(rule_thickness,90); x2=.5w;  
y2l=good.y -(.25x_height-math_axis);  
numeric theta; theta=angle((z2-z1)yscaled 3); 
penpos1(rule_thickness,90+theta); 
penpos3(rule_thickness,90-theta);  
draw z1{dir theta}...z2...{dir-theta}z3;  
penlabels(1,2,3); endchar; 

cmchar "Simple slur above (frown)"; 
beginchar(oct"141",14u#,asc_height#,desc_depth#); 
adjust_fit(0,0); pickup rule.nib;  
lft x1=hround u; y1=vround(math_axis-.25x_height);  
x3=w-x1; y3=y1;  
penpos2(rule_thickness,90); x2=.5w; y2=good.y(.25x_height+math_axis);  
numeric theta; theta=angle((z2-z1)yscaled 3); 
penpos1(rule_thickness,90+theta); 
penpos3(rule_thickness,90-theta);  
draw z1{dir theta}...z2...{dir-theta}z3; penlabels(1,2,3); 
endchar; 
 
cmchar "Very proper subset sign";  
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$'  
spread':=spread'-rule_thickness; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"142",14u#,v_center(spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib; 
autorounded; lft x2=hround 1.5u-eps; x1=x3=w-x2; 
y1-y3=spread; y2=.5[y1,y3]=math_axis; x4=x5=.5w; y4=y1; 
y5=y3; draw z1---z4...z2{down}...z5---z3;  % arc and bars 
x1'=x3'=x1; y1-y1'=y3'-y3=spread'; 
x4'=x5'=x4; y4-y4'=y5'-y5=spread'; 
y2'=y2; x2'-x2=spread'; 
draw z1'--z4'..z2'{down}..z5'--z3'; 
penlabels(1,2,3,4,5,1',2',3',4',5'); endchar; 

cmchar "Very proper superset sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
spread':=spread'-rule_thickness; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"143",14u#,v_center(spread#+rule_thickness#)); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib; 
autorounded; lft x1=hround 1.5u-eps; x2=w-x1; x3=x1; 
y1-y3=spread; y2=.5[y1,y3]=math_axis; x4=x5=.5w; y4=y1; 
y5=y3; draw z1---z4...z2{down}...z5---z3;  % arc and bars 
x1'=x3'=x1; y1-y1'=y3'-y3=spread'; 
x4'=x5'=x4; y4-y4'=y5'-y5=spread'; 
y2'=y2; x2-x2'=spread'; 
draw z1'--z4'..z2'..z5'--z3'; 
penlabels(1,2,3,4,5,1',2',3',4',5'); endchar;  
 
cmchar "Parallel set union sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
spread':=spread'-rule_thickness; 
beginchar(oct"144",12u#,.8asc_height#,0);  
italcorr .8asc_height#*slant-.5u#;  
adjust_fit(0,0); pickup rule.nib; autorounded;  
lft x1=hround u; x2=x1; x3=w-x3; x4=x5=w-x1;  
y1=good.y h+o; bot y3=-o; y2=y4=2/3[y1,y3]; y5=y1;  
draw z1---z2...z3...z4---z5;  % stems and cup  
y1'=y5'=y1; x1'-x1=x5-x5'=spread'; 
y2'=y4'=y2+u; x2'-x2=x4-x4'=spread'; 
x3'=x3; y3'-y3=spread'; 
draw z1'..{down}z2'..z3'{right}..z4'{up}..z5'; 
penlabels(1,2,3,4,5,1',2',3',4',5'); endchar; 

cmchar "Parallel set intersection sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
spread':=spread'-rule_thickness; 
beginchar(oct"145",12u#,.8asc_height#,0);  
italcorr .8asc_height#*slant-.5u#; adjust_fit(0,0);  
pickup rule.nib; autorounded;  
lft x1=hround u; x2=x1; x3=w-x3; x4=x5=w-x1;  
y3=good.y h+o; bot y1=-o; y2=y4=2/3[y1,y3]; y5=y1;  
draw z1---z2...z3...z4---z5;  % stems and cap  
y1'=y5'=y1; x1'-x1=x5-x5'=spread'; 
y2'=y4'=y2-u; x2'-x2=x4-x4'=spread'; 
x3'=x3; y3-y3'=spread'; 
draw z1'..{up}z2'..z3'{right}..z4'{down}..z5'; 
penlabels(1,2,3,4,5,1',2',3',4',5'); endchar; 
  
cmchar "Subset or (double) equal to sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"152",14u#,v_center(2spread#'+spread#+2rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; autorounded; lft x2=hround 
1.5u-eps; x1=x3=w-x2; y1-y3=spread; y2=.5[y1,y3]; top y1=h; 
x4=x5=.5w; y4=y1; y5=y3; draw z1---z4...z2{down}...z5---z3;  
% arc and bars 
x8=x1; x9=x2;  
y8=y9; y3-y9=spread'; draw z8--z9;  % lower bar  
x9'=x9; x8'=x8; y9'=y8'; y9-y9'=spread'; draw z8'--z9'; 
penlabels(1,2,3,4,5,8,9,8',9'); endchar; 

cmchar "Superset or (double) equal to sign"; 
compute_spread(.45x_height#,.55x_height#); 
spread#':=spread#; spread':=spread; % the spread of `$=$' 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"153",14u#,v_center(2spread#'+spread#+2rule_thickness#)); 
adjust_fit(0,0); pickup rule.nib; autorounded; lft x1=hround 
1.5u-eps; x2=w-x1; x3=x1; y1-y3=spread; y2=.5[y1,y3]; top 
y1=h; x4=x5=.5w; y4=y1; y5=y3; draw 
z1---z4...z2{down}...z5---z3;  % arc and bars 
x8=x1; 
x9=x2;  
y8=y9; y3-y9=spread'; draw z8--z9;  % lower bar  
x9'=x9; x8'=x8; y9'=y8'; y9-y9'=spread'; draw z8'--z9'; 
labels(1,2,3,4,5,8,9); endchar; 

cmchar "Christmas tree symbol";  
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"146",spread#+4u#,.8asc_height#,0); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib; 
autorounded;  
lft x1=1.5u; x3=w-x1; x2=.5[x1,x3]; 
bot y1=-d-o; y3=y1; top y2=h+o; 
draw z1{spread,u}...{up}z2; 
draw z3{-spread,u}...{up}z2; 
penlabels(1,2,3); endchar; 

cmchar "Inverted Christmas tree symbol";  
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"147",spread#+4u#,.8asc_height#,0); 
italcorr h#*slant-u#; adjust_fit(0,0); pickup rule.nib; 
autorounded;  
lft x1=1.5u; x3=w-x1; x2=.5[x1,x3]; 
top y1=h+o; y3=y1; bot y2=-d-o; 
draw z1{spread,-u}...{down}z2; 
draw z3{-spread,-u}...{down}z2; 
penlabels(1,2,3); endchar; 

cmchar "Stylized lambda symbol"; 
beginchar(oct"150",14u#,asc_height#,0); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x1=u; top y1=h;
rt x2=w-u; bot y2=-o; 
draw z1--z2; 
z3=.5[z1,z2]; 
x4=x1; y4=y2; draw z3--z4; 
penlabels(1,2,3,4); endchar; 
 
cmchar "Reflected stylized lambda symbol"; 
beginchar(oct"151",14u#,asc_height#,0); 
adjust_fit(0,0); pickup rule.nib; autorounded; 
lft x1=u; bot y1=-o;
rt x2=w-u; top y2=h; 
draw z1--z2; 
z3=.5[z1,z2]; 
x4=x2; y4=y1; draw z3--z4; 
penlabels(1,2,3,4); endchar; 
 
cmchar "Sunrise symbol"; 
compute_spread(.45x_height#,.55x_height#);  
beginchar(oct "154",14u#,v_center(3spread#+rule_thickness#)); 
italcorr h#*slant-.5u#; adjust_fit(0,0); pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1; y1=y2; y3=y4; 
y1-y3=spread; .5[y1,y3]=math_axis;  
y5=y6=y1; x7=.5[x1,x2]; x5=.3[x1,x2];  
x2-x6=x5-x1; 
y7-y1=.5(x6-x5); 
draw z1--z5{up}...z7...{down}z6--z2;  % upper bar  
draw z3--z4;  % lower bar  
penlabels(1,2,3,4,5,6,7); endchar; 
 
cmchar "Sunrise-over-water symbol"; 
compute_spread(.45x_height#,.55x_height#);  
beginchar(oct "155",14u#,v_center(3spread#+rule_thickness#)); 
italcorr h#*slant-.5u#; adjust_fit(0,0); pickup rule.nib; 
lft x1=hround u-eps; x3=x1; x2=x4=w-x1; y1=y2; y3=y4; 
y1-y3=spread; .5[y1,y3]=math_axis;  
y5=y6=y1; x7=.5[x1,x2]; x5=.3[x1,x2];  
x2-x6=x5-x1; 
y7-y1=.5(x6-x5); 
x5'=x5; x7'=x7; x6'=x6; y5'=y6'=y3; y3-y7'=y7-y1; 
draw z1--z5{up}...z7...{down}z6--z2;  % upper bar  
draw z3--z5'{down}...z7'...{up}z6'--z4;  % lower bar  
penlabels(1,2,3,4,5,6,7); endchar; 
 
cmchar "Much, much less sign"; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"156",24u#,v_center(spread#+rule_thickness#)); 
adjust_fit(if monospace:-u#,-u# else: 0,0 fi); pickup 
rule.nib; lft x2=hround u-epsilon; x1=x3=hround 12.5u-x2;  
y1-y3=ceiling 1.1spread; y2=.5[y1,y3]=math_axis;  
draw z1--z2--z3;  % left diagonals  
z4-z1=z5-z2=z6-z3=z7-z4=z8-z5=z9-z6; 
x7=w-x2; y4=y1;  
draw z4--z5--z6;  % middle diagonals  
draw z7--z8--z9;  % right diagonals 
penlabels(1,2,3,4,5,6,7,8,9); endchar; 

cmchar "Much, much greater sign"; 
compute_spread(5/4x_height#,3/2x_height#); 
beginchar(oct"157",24u#,v_center(spread#+rule_thickness#)); 
adjust_fit(if monospace:-u#,-u# else: 0,0 fi); pickup 
rule.nib;  
lft x1=hround u-epsilon; x2=hround 12.5u-u; x1=x3;  
y1-y3=ceiling 1.1spread; y2=.5[y1,y3]=math_axis;  
draw z1--z2--z3;  % left diagonals  
z4-z1=z5-z2=z6-z3=z7-z4=z8-z5=z9-z6; 
x8=w-x1; y4=y1;  
draw z4--z5--z6;  % middle diagonals  
draw z7--z8--z9;  % right diagonals 
penlabels(1,2,3,4,5,6,7,8,9); endchar; 

cmchar "Northwest right angle symbol"; 
beginchar(oct"160",9u#, asc_height#, 0); 
adjust_fit(0,0); pickup rule.nib; 
x1=x2; lft x1=u; x3=w-x1; y2=y3; top y2=h; 
y2-y1=x3-x2;  
draw z1--z2--z3; 
penlabels(1,2,3); endchar; 
 
cmchar "Northeast right angle symbol"; 
beginchar(oct"161",9u#,asc_height#,0); 
adjust_fit(0,0); pickup rule.nib; 
lft x3=u; x2=w-x3; top y3=h; y3=y2; x1=x2; x2-x3=y2-y1; 
draw z1--z2--z3;  
penlabels(1,2,3); endchar; 
 
cmchar "Southwest right angle symbol"; 
beginchar(oct"170", 9u#, 7u#,0); 
adjust_fit(0,0); pickup rule.nib; 
lft x2=u; x3=w-x2; x1=x2; bot y2=-o; y3=y2; 
y1-y2=x3-x2; 
draw z1--z2--z3; 
penlabels(1,2,3); endchar; 
 
cmchar "Southeast right angle symbol"; 
beginchar(oct"171", 9u#, 7u#,0); 
adjust_fit(0,0); pickup rule.nib;  
lft x3=u; x2=w-x3; x1=x2; bot y2=-o; y3=y2; 
y1-y2=x2-x3; 
draw z1--z2--z3; 
penlabels(1,2,3); endchar; 


cmchar "Pitchfork symbol";
beginchar(oct"164",12u#,asc_height#,0);
italcorr .8asc_height#*slant-.5u#;
adjust_fit(0,0); pickup rule.nib; autorounded;
lft x1=hround u; x2=x1; x3=w-x3; x4=x5=w-x1;
y3=good.y .7h+o; bot y1=-o; y2=y4=2/3[y1,y3]; y5=y1;
draw z1---z2...z3...z4---z5;  % stems and cap 
x6=x7=good.x w/2; y6=y1; y7=h+o; 
draw z6--z7; % stem
penlabels(1,2,3,4,5,6,7); endchar;

cmchar "Dotted plus sign";
beginchar(oct"165",14u#,8u#+math_axis#,6u#-math_axis#); 
adjust_fit(0,0); pickup rule.nib;
x1=x2=good.x .5w; top y1=h-2.5rule_thickness+eps; .5[y1,y2]=math_axis;
lft x3=hround u-eps; x4=w-x3; y3=y4=math_axis;
draw z1--z2;  % stem
draw z3--z4;  % crossbar 
x5=x1;  y5=h+o;  
pickup pencircle scaled 2.5rule_thickness; drawdot z5;
penlabels(1,2,3,4,5); endchar;

cmchar "Inverted similarity sign";
compute_spread(.45x_height#,.55x_height#);
beginchar(oct"166",14u#,v_center(spread#+rule_thickness#));
adjust_fit(0,0);
pickup pencircle xscaled .7rule_thickness yscaled 1.4rule_thickness;
if vair#>.8curve#: pickup rule.nib; autorounded; fi % monoline
lft x1=hround(u); x2=4u; x3=w-x2; x4=w-x1;
bot y2=bot y4=-d; top y1=top y3=h;
draw z1{down}...z2{right}..{right}z3...{down}z4;  % stroke
labels(1,2,3,4); endchar;

cmchar "Inverted similar or equal sign";
compute_spread(.45x_height#,.55x_height#);
beginchar(oct"167",14u#,v_center(2spread#+rule_thickness#));
adjust_fit(0,0);
pickup pencircle xscaled .7rule_thickness yscaled 1.4rule_thickness;
if vair#>.8curve#: pickup rule.nib; autorounded; fi % monoline
lft x1=hround(u); x2=4u; x3=w-x2; x4=w-x1;
bot y2=bot y4=floor math_axis; top y1=top y3=h;
draw z1{down}...z2{right}..{right}z3...{down}z4;  % stroke
pickup rule.nib; lft x5=hround u-eps; x6=w-x5; y5=y6=math_axis-spread;
draw z5--z6;  % bar
labels(1,2,3,4,5,6); endchar;

cmchar "Iron cross";
beginchar(oct"172",15u#,asc_height#,0); adjust_fit(0,0); 
pickup pencircle scaled .5rule_thickness; 
numeric cross_tension; cross_tension=.9; 
numeric cross_foot; cross_foot=4u;
y0=.5[y1,y2]; x0=hround w/2; 
x1=x2=x0; bot y1=-o; lft x1l=3.5u; x1r=w-x1l; y1l=y1r=y1; 
top y2=h+o; x2r=x1l; x2l=x1r; y2l=y2r=y2; 
y3=y4=y0; x3=x0+eps; x4+x3=2x0; 
path p; p=z1l--z1r..tension cross_tension..z3..tension cross_tension 
 ..z2l--z2r..tension cross_tension..z4..tension cross_tension.. 
 z1l..cycle; 
filldraw p; 
p:=p shifted -z0; p:=p rotated 90; p:=p shifted z0; 
filldraw p; 
penlabels(0,1,2,3,4); endchar; 
 
cmchar "Bourbaki C symbol"; 
beginchar(oct"173",9u#, 1.1body_height#, 0); 
adjust_fit(0,0); pickup pencircle scaled 2rule_thickness; 
lft x4=lft x5=u; x1=x2=x8=x7=w-x4; x3=x6=hround 
w/2; 
bot y6=-o; top y3=h+o; y2=y4=y3-1.8u; y5=y7=y6+1.8u; 
y1=y2-2u; y8=y7+2u; 
draw z1--z2{up}..{left}z3..{down}z4--z5{down}..z6{right}..{up}z7--z8; 
labels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Bourbaki T symbol"; 
beginchar(oct "174", 10u#, x_height#, desc_depth#); 
adjust_fit(0,0); pickup pencircle scaled 2rule_thickness; 
lft x1=u; x2=w-x1; top y1=top y2=h; x3=x4=hround w/2; y3=y1; 
bot y4=-1.1d; 
draw z1--z2; draw z3--z4; 
labels(1,2,3,4); endchar; 

cmchar "Circle-in-a-circle operator";
beginarithchar(oct"175"); pickup light_rule.nib; autorounded;
lft x6=hround u; x2=w-x6; y2=math_axis; top y8=h;
circle_points; draw_circle;  % circle 
pickup rule.nib; 
numeric x[],y[]; 
lft x6=hround 4.5u; x2=w-x6; y2=math_axis;  
top y8=y2+.5(rt x2-lft x6); circle_points; draw_circle; 
labels(1,2,3,4,5,6,7,8); endchar; 
 
cmchar "Asterisk-in-a-circle";
beginarithchar(oct"176");
pickup light_rule.nib; autorounded;
y2=math_axis; top y8=6u+math_axis;
lft x6=hround w/2 - 6u; x2=w-x6; 
circle_points; draw_circle;  % circle 
numeric x[], y[]; 
numeric ast_flare; ast_flare=hround .7[thin_join,stem]; 
x0=.5w; y0=math_axis; for d=-150 step 60 until 150: 
z[d]=z0+.5dir d xscaled 7.5u yscaled x_height; 
 numeric theta; theta=angle(z[d]-z0);
 fill z0+.5(0,-thin_join)rotated theta
  ---z[d]+.5(-ast_flare,-ast_flare)rotated theta
  ..z[d]..z[d]+.5(-ast_flare,ast_flare)rotated theta
  ---z0+.5(0,thin_join)rotated theta--cycle; endfor  % diagonal at angle |d|
labels(0,[-150],[-90],[-30],30,90,150); endchar;
 
cmchar "Bar-in-a-circle operator";
beginarithchar(oct"177"); pickup light_rule.nib; autorounded;
lft x6=hround u; x2=w-x6; y2=math_axis; top y8=h;
circle_points; draw_circle;  % circle 
y9=y10=y2; x9=x6+3u; x10=w-x9; 
draw z9--z10; 
labels(1,2,3,4,5,6,7,8,9,10); endchar; 

