More Equation Fonts

Carl Milsted, Jr on Dec 18 16:11:09

I have just added support for more glyph styles for Latin letters when in equation mode. However, instead of typing bold or roman before a latter, I opted to just use prefixes.

The reason is historical. When troff was created, there was no Unicode. Different fonts needed to be loaded for different glyph styles as well as for symbols. With Unicode, a single font can contain all the glyphs needed for doing math. One just needs to map the Latin letters to different Unicode values for different styles. It turned out I could most easily modify GNU eqn to do this by using prefixes vs. adding new keywords.

Prefix	Name
ds	Double Stroke
frak	Fraktur
bfrak	Bold Fraktur
scr	Script
bscr	Bold Script
ss	Sans Serif
bss	Bold Sans Serif

For example the eqn code

.eqn
scrA hat = {bold scrA} over scrA
..eqn

yields

\hat{𝒜} = \frac{𝓐}{𝒜}

Here is a complete table:

Letter\Prefix	ds	frak	bfrak	scr	bscr	ss	bss
A	$𝔸$	$𝔄$	$𝕬$	$𝒜$	$𝓐$	$𝖠$	$𝗔$
B	$𝔹$	$𝔅$	$𝕭$	$ℬ$	$𝓑$	$𝖡$	$𝗕$
C	$ℂ$	$ℭ$	$𝕮$	$𝒞$	$𝓒$	$𝖢$	$𝗖$
D	$𝔻$	$𝔇$	$𝕯$	$𝒟$	$𝓓$	$𝖣$	$𝗗$
E	$𝔼$	$𝔈$	$𝕰$	$ℰ$	$𝓔$	$𝖤$	$𝗘$
F	$𝔽$	$𝔉$	$𝕱$	$ℱ$	$𝓕$	$𝖥$	$𝗙$
G	$𝔾$	$𝔊$	$𝕲$	$𝒢$	$𝓖$	$𝖦$	$𝗚$
H	$ℍ$	$ℌ$	$𝕳$	$ℋ$	$𝓗$	$𝖧$	$𝗛$
I	$𝕀$	$ℑ$	$𝕴$	$ℐ$	$𝓘$	$𝖨$	$𝗜$
J	$𝕁$	$𝔍$	$𝕵$	$𝒥$	$𝓙$	$𝖩$	$𝗝$
K	$𝕂$	$𝔎$	$𝕶$	$𝒦$	$𝓚$	$𝖪$	$𝗞$
L	$𝕃$	$𝔏$	$𝕷$	$ℒ$	$𝓛$	$𝖫$	$𝗟$
M	$𝕄$	$𝔐$	$𝕸$	$ℳ$	$𝓜$	$𝖬$	$𝗠$
N	$ℕ$	$𝔑$	$𝕹$	$𝒩$	$𝓝$	$𝖭$	$𝗡$
O	$𝕆$	$𝔒$	$𝕺$	$𝒪$	$𝓞$	$𝖮$	$𝗢$
P	$ℙ$	$𝔓$	$𝕻$	$𝒫$	$𝓟$	$𝖯$	$𝗣$
Q	$ℚ$	$𝔔$	$𝕼$	$𝒬$	$𝓠$	$𝖰$	$𝗤$
R	$ℝ$	$ℜ$	$𝕽$	$ℛ$	$𝓡$	$𝖱$	$𝗥$
S	$𝕊$	$𝔖$	$𝕾$	$𝒮$	$𝓢$	$𝖲$	$𝗦$
T	$𝕋$	$𝔗$	$𝕿$	$𝒯$	$𝓣$	$𝖳$	$𝗧$
U	$𝕌$	$𝔘$	$𝖀$	$𝒰$	$𝓤$	$𝖴$	$𝗨$
V	$𝕍$	$𝔙$	$𝖁$	$𝒱$	$𝓥$	$𝖵$	$𝗩$
W	$𝕎$	$𝔚$	$𝖂$	$𝒲$	$𝓦$	$𝖶$	$𝗪$
X	$𝕏$	$𝔛$	$𝖃$	$𝒳$	$𝓧$	$𝖷$	$𝗫$
Y	$𝕐$	$𝔜$	$𝖄$	$𝒴$	$𝓨$	$𝖸$	$𝗬$
Z	$ℤ$	$ℨ$	$𝖅$	$𝒵$	$𝓩$	$𝖹$	$𝗭$
a	$𝕒$	$𝔞$	$𝖆$	$𝒶$	$𝓪$	$𝖺$	$𝗮$
b	$𝕓$	$𝔟$	$𝖇$	$𝒷$	$𝓫$	$𝖻$	$𝗯$
c	$𝕔$	$𝔠$	$𝖈$	$𝒸$	$𝓬$	$𝖼$	$𝗰$
d	$𝕕$	$𝔡$	$𝖉$	$𝒹$	$𝓭$	$𝖽$	$𝗱$
e	$𝕖$	$𝔢$	$𝖊$	$ℯ$	$𝓮$	$𝖾$	$𝗲$
f	$𝕗$	$𝔣$	$𝖋$	$𝒻$	$𝓯$	$𝖿$	$𝗳$
g	$𝕘$	$𝔤$	$𝖌$	$ℊ$	$𝓰$	$𝗀$	$𝗴$
h	$𝕙$	$𝔥$	$𝖍$	$𝒽$	$𝓱$	$𝗁$	$𝗵$
i	$𝕚$	$𝔦$	$𝖎$	$𝒾$	$𝓲$	$𝗂$	$𝗶$
j	$𝕛$	$𝔧$	$𝖏$	$𝒿$	$𝓳$	$𝗃$	$𝗷$
k	$𝕜$	$𝔨$	$𝖐$	$𝓀$	$𝓴$	$𝗄$	$𝗸$
l	$𝕝$	$𝔩$	$𝖑$	$𝓁$	$𝓵$	$𝗅$	$𝗹$
m	$𝕞$	$𝔪$	$𝖒$	$𝓂$	$𝓶$	$𝗆$	$𝗺$
n	$𝕟$	$𝔫$	$𝖓$	$𝓃$	$𝓷$	$𝗇$	$𝗻$
o	$𝕠$	$𝔬$	$𝖔$	$ℴ$	$𝓸$	$𝗈$	$𝗼$
p	$𝕡$	$𝔭$	$𝖕$	$𝓅$	$𝓹$	$𝗉$	$𝗽$
q	$𝕢$	$𝔮$	$𝖖$	$𝓆$	$𝓺$	$𝗊$	$𝗾$
r	$𝕣$	$𝔯$	$𝖗$	$𝓇$	$𝓻$	$𝗋$	$𝗿$
s	$𝕤$	$𝔰$	$𝖘$	$𝓈$	$𝓼$	$𝗌$	$𝘀$
t	$𝕥$	$𝔱$	$𝖙$	$𝓉$	$𝓽$	$𝗍$	$𝘁$
u	$𝕦$	$𝔲$	$𝖚$	$𝓊$	$𝓾$	$𝗎$	$𝘂$
v	$𝕧$	$𝔳$	$𝖛$	$𝓋$	$𝓿$	$𝗏$	$𝘃$
w	$𝕨$	$𝔴$	$𝖜$	$𝓌$	$𝔀$	$𝗐$	$𝘄$
x	$𝕩$	$𝔵$	$𝖝$	$𝓍$	$𝔁$	$𝗑$	$𝘅$
y	$𝕪$	$𝔶$	$𝖞$	$𝓎$	$𝔂$	$𝗒$	$𝘆$
z	$𝕫$	$𝔷$	$𝖟$	$𝓏$	$𝔃$	$𝗓$	$𝘇$

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