1
—1—
Introduction
The amsmath
package is a L
A
T
E
X package that provides miscellaneous enhance-
ments for improving the information structure and printed output of documents
that contain mathematical formulas. Readers unfamiliar with L
A
T
E
X should refer
to [7]. If you have an up-to-date version of L
A
T
E
X, the amsmath package is nor-
mally provided along with it. Upgrading when a newer version of the
amsmath
package is released can be done via
http://www.ams.org/tex/amsmath.html
or
ftp://ftp.ams.org/pub/tex/
.
This documentation describes the features of the amsmath package and dis-
cusses how they are intended to be used. It also covers some ancillary packages:
amsbsy amstext
amscd amsxtra
amsopn
These all have something to do with the contents of math formulas. For infor-
mation on extra math symbols and math fonts, see [1] and http://www.ams.
org/tex/amsfonts.html
. For documentation of the amsthm
package or AMS
document classes (amsart
,
amsbook
, etc.) see [3] or [2] and
http://www.ams.
org/tex/author-info.html.
If you are a long-time L
A
T
E
X user and have lots of mathematics in what you
write, then you may recognize solutions for some familiar problems in this list
of amsmath
features:
•
A convenient way to define new ‘operator name’ commands analogous to
\sin
and
\lim
, including proper side spacing and automatic selection of
the correct font style and size (even when used in sub- or superscripts).
• Multiple substitutes for the
eqnarray
environment to make various kinds
of equation arrangements easier to write.
• Equation numbers automatically adjust up or down to avoid overprinting
on the equation contents (unlike eqnarray
).
•
Spacing around equals signs matches the normal spacing in the
equation
environment (unlike eqnarray
).
•
A way to produce multiline subscripts as are often used with summation
or product symb ols.
•
An easy way to substitute a variant equation number for a given equation
instead of the automatically supplied number.
• An easy way to produce subordinate equation numbers of the form (1.3a)
(1.3b) (1.3c) for selected groups of equations.
The
amsmath
package is distributed together with some small auxiliary pack-
ages:
amsmath Primary package, provides various features for displayed equations and
other mathematical constructs.
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