[unix-history] / usr / doc / eqn / e0

.nr PS 9
.nr VS 11
....ND "Revised  April, 1977"
.EQ
delim $$
gsize 9
.EN
....TR 17
.TL
A System for Typesetting Mathematics
.AU
Brian W. Kernighan and Lorinda L. Cherry
.AI
.MH
.AB
.PP
This paper describes the design and implementation
of a system for typesetting mathematics.
The language has been designed to be easy to learn
and to use
by people
(for example, secretaries and mathematical typists)
who know neither mathematics nor typesetting.
Experience indicates that the language can
be learned in an hour or so,
for it has few rules and fewer exceptions.
For typical expressions,
the size and font changes, positioning, line drawing,
and the like necessary to print according to mathematical conventions
are all done automatically.
For example,
the input
.sp 4p
.ce
sum from i=0 to infinity x sub i = pi over 2
.sp 4p
produces
.EQ
sum from i=0 to infinity x sub i = pi over 2
.EN
.PP
The syntax of the language is specified by a small
context-free grammar;
a compiler-compiler is used to make a compiler
that translates this language into typesetting commands.
Output may be produced on either a phototypesetter
or on a terminal with forward and reverse half-line motions.
The system interfaces directly with text formatting programs,
so mixtures of text and mathematics may be handled simply.
.LP
.LP
.PP
This paper is a revision of a paper originally published in
CACM, March, 1975.
.AE
Commit	Line	Data
8340f87c BJ	1	.nr PS 9
	2	.nr VS 11
	3	....ND "Revised April, 1977"
	4	.EQ
	5	delim $$
	6	gsize 9
	7	.EN
	8	....TR 17
	9	.TL
	10	A System for Typesetting Mathematics
	11	.AU
	12	Brian W. Kernighan and Lorinda L. Cherry
	13	.AI
	14	.MH
	15	.AB
	16	.PP
	17	This paper describes the design and implementation
	18	of a system for typesetting mathematics.
	19	The language has been designed to be easy to learn
	20	and to use
	21	by people
	22	(for example, secretaries and mathematical typists)
	23	who know neither mathematics nor typesetting.
	24	Experience indicates that the language can
	25	be learned in an hour or so,
	26	for it has few rules and fewer exceptions.
	27	For typical expressions,
	28	the size and font changes, positioning, line drawing,
	29	and the like necessary to print according to mathematical conventions
	30	are all done automatically.
	31	For example,
	32	the input
	33	.sp 4p
	34	.ce
	35	sum from i=0 to infinity x sub i = pi over 2
	36	.sp 4p
	37	produces
	38	.EQ
	39	sum from i=0 to infinity x sub i = pi over 2
	40	.EN
	41	.PP
	42	The syntax of the language is specified by a small
	43	context-free grammar;
	44	a compiler-compiler is used to make a compiler
	45	that translates this language into typesetting commands.
	46	Output may be produced on either a phototypesetter
	47	or on a terminal with forward and reverse half-line motions.
	48	The system interfaces directly with text formatting programs,
	49	so mixtures of text and mathematics may be handled simply.
	50	.LP
	51	.LP
	52	.PP
	53	This paper is a revision of a paper originally published in
	54	CACM, March, 1975.
	55	.AE