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E 的代码
e2
.NH
Photocomposition
.PP
Photocomposition t<mark>e</mark>chniqu<mark>e</mark>s
can b<mark>e</mark> us<mark>e</mark>d to solv<mark>e</mark> som<mark>e</mark> of th<mark>e</mark> probl<mark>e</mark>ms of typ<mark>e</mark>s<mark>e</mark>tting math<mark>e</mark>matics.
A phototyp<mark>e</mark>s<mark>e</mark>tt<mark>e</mark>r is a d<mark>e</mark>vic<mark>e</mark> which <mark>e</mark>xpos<mark>e</mark>s ...
e1
.2C $gsize 9$
.nr PS 9
.nr VS 11p
.NH
Introduction
.PP
``Mathematics is known in the trade as
.ul
difficult,
or
.ul
penalty, copy
because it is slower, more difficult,
and more expensive to set in typ
e7
.NH
Conclusions
.PP
We think we have shown that it is possible
to do acceptably good typesetting of mathematics
on a phototypesetter,
with an input language that is easy to learn and use and
that sati
e0
.nr PS 9
.nr VS 11
....ND "Revised April, 1977"
.EQ
delim $$
gsize 9
.EN
....TR 17
.TL
A System for Typesetting Mathematics
.AU
Brian W. Kernighan and Lorinda L. Cherry
.AI
.MH
.AB
.PP
This paper des
e5
.NH
Languag<mark>e</mark> Th<mark>e</mark>ory
.PP
Th<mark>e</mark> basic structur<mark>e</mark> of th<mark>e</mark> languag<mark>e</mark> is
not a particularly original on<mark>e</mark>.
<mark>E</mark>quations ar<mark>e</mark> pictur<mark>e</mark>d as a s<mark>e</mark>t of ``box<mark>e</mark>s,''
pi<mark>e</mark>c<mark>e</mark>d tog<mark>e</mark>th<mark>e</mark>r in various ways.
For <mark>e</mark ...
e.mac
.tr _\(em
.tr *\(**
.de UC
\&\\$3\s-1\\$1\\s0\&\\$2
..
.de IT
.if n .ul
\&\\$3\f2\\$1\fP\&\\$2
..
.de UL
.if n .ul
\&\\$3\f3\\$1\fP\&\\$2
..
.de BD
.bd 3 \\$1
..
.de BI
.bd I \\$1
..
.de P1
.DS I 3n
.
e4
.SH
<mark>E</mark>x<mark>e</mark>rcis<mark>e</mark> 5:
.PP
<mark>E</mark>xp<mark>e</mark>rim<mark>e</mark>nt with th<mark>e</mark> substitut<mark>e</mark> command.
S<mark>e</mark><mark>e</mark> what happ<mark>e</mark>ns if you
substitut<mark>e</mark> for som<mark>e</mark> word on a lin<mark>e</mark> with s<mark>e</mark>v<mark>e</mark>ral occurr<mark>e</mark>nc<mark>e</mark>s of that word.
For <mar ...
e3
.SH
Th<mark>e</mark> curr<mark>e</mark>nt lin<mark>e</mark> \- ``Dot'' or ``.''
.PP
Suppos<mark>e</mark> your buff<mark>e</mark>r still contains th<mark>e</mark> six lin<mark>e</mark>s as abov<mark>e</mark>,
that you hav<mark>e</mark> just typ<mark>e</mark>d
.P1
1,3p
.P2
and
.ul
<mark>e</mark>d
has print<mark>e</mark>d th<mark>e</mark> thr<mark>e</mark><mark>e</mark> lin<mark>e</mark>s for you.
Tr ...
e6
.SH
Sp<mark>e</mark>cial Charact<mark>e</mark>rs
.PP
You may hav<mark>e</mark> notic<mark>e</mark>d that things just don't work right wh<mark>e</mark>n you us<mark>e</mark>d
som<mark>e</mark> charact<mark>e</mark>rs lik<mark>e</mark>
\*.,
.UL * ,
.UL $ ,
and oth<mark>e</mark>rs in
cont<mark>e</mark>xt s<mark>e</mark>arch<mark>e</mark>s and th<mark>e</mark> substitut<mark>e</mark> command.
Th<mark> ...
e2
.SH
Writing t<mark>e</mark>xt out as a fil<mark>e</mark> \- th<mark>e</mark> Writ<mark>e</mark> command ``w''
.PP
It's lik<mark>e</mark>ly that you'll want to sav<mark>e</mark> your t<mark>e</mark>xt for lat<mark>e</mark>r us<mark>e</mark>.
To writ<mark>e</mark> out th<mark>e</mark> cont<mark>e</mark>nts of th<mark>e</mark> buff<mark>e</mark>r onto a fil<mark>e</mark>,
us<mark>e</mark> th<mark>e</ ...