amslatex.chg, last updated 5-Oct-1994

This is a list of significant changes in AMS-LaTeX, from the end user's
perspective. Commands marked as "OBSOLETE" are retained but in native
LaTeX2e mode they will give an on-screen warning at their first use.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
amstex package:

---Fixed certain numbering problems with alignat, xalignat*, equation*,
multline
---Made \operatorname's robust
---General cleanup of documentation. Moved remarks regarding the
conversion from amstex.tex to a separate file, amst-hst.tex.
---Added \ProvidesPackage command, used \RequirePackage instead of
\input where appropriate, etc.
---Reworked error messages to use new LaTeX standard error format for
packages and document classes.
---Moved the following rarely used commands to amsxtra package:
\fracwithdelims, \accentedsymbol, `sup accents' (\sptilde, \sphat, etc),
---Moved variant definitions of \/, \slash to amsxtra.dtx. Italic
correction command \/ should rarely be needed because users have font
commands \textit, \textsl, etc. that automatically take care of the
italic correction.
---Made \lcfrac, \rcfrac OBSOLETE. New syntax is \cfrac{...}{...} or
\cfrac[l]{...}{...} to get left-positioned numerators or \cfrac[r]...
for right-positioned numerators.
---Made \operatornamewithlimits OBSOLETE: new name is \operatorname*.
---Removed \oldnos command. Rarely used, and where needed standard
LaTeX font mechanisms can be used.
---Changed mathchardef statements for cap Greek to be skipped if
pre-existing definition of \Gamma is not the expected one
(\mathchar"7000), to avoid overwriting nonstandard encoding
definitions for the cap Greek.
---Added subequations environment, for example

  \begin{subequations}{a}
  ...
  \end{subequations}

causes all numbered equation environments within that scope to be
numbered (4.9a) (4.9b) (4.9c) etc. if the preceding numbered equation
was 4.8. The argument can be a,A,i,I,1,f for the standard LaTeX
numbering types: \alph, \Alph, \roman, \Roman, \arabic, \fnsymbol.
A \label command immediately after \begin{subequations}{...} will
produce a \ref of the parent number "4.9", not "4.9a". The counters used
by the subequations environment are `parentequation' and `equation' and
standard uses of \addtocounter, \setcounter, etc. are possible with
those counter names.
---If the parent documentclass has equation numbers on the right,
\usepackage{amstex} does not change them to the left. [Technical note:
a documentclass that has `leqno' as the default should explicitly pass
that option to the amstex package with \PassOptionsToPackage in order
for it to be effective.]
---Added noamsfonts option, psamsfonts option (passed on to amsfonts
package qv)
---Added support for fleqn option (thanks to David M. Jones)
---Added \adjusttag{...} for vertical adjustment to tag position (thanks
to David M. Jones)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
amsfonts package:

---Removed \goth
---\newsymbol, \bold, \Bbb, \frak: all OBSOLETE, in favor of
\DeclareMathSymbol, \mathbf, \mathbb, \mathfrak. Note that the syntax
of \DeclareMathSymbol is different from that of \newsymbol; details
are found in the LaTeX documentation (fntguide.tex or `The LaTeX
Companion').
---Added noamsfonts package option to suppress loading of AMS fonts
msam, msbm, eufm. (The apparently useless statement
\usepackage[noamsfonts]{amsfonts} does in fact have some useful effects,
as things are currently arranged.) This means that if you don't need any
symbols from those fonts, you can use the amstex package or the
amsart,amsbook document classes without needing .tfm files from the
AMSfonts package:

  \documentclass{article}
  \usepackage[noamsfonts]{amstex}

or

  \documentclass[noamsfonts]{amsart}

---Added psamsfonts package option to force using different .fd files
for msam, msbm, eufm fonts that do not assume tfm files are present for
sizes 6,8,9 (as in the PS versions of the AMS fonts from Y&Y/Blue Sky)
and to communicate *in the document file* the presence of this
difference.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
amsart/amsbook:
---Made \rom OBSOLETE: now \textup should be used.
---Added \larger, \smaller and extended the range of font size commands
to include \Small, \SMALL, \tiny, \Tiny (but not \TINY or \HUGE).
---Separated out theorem stuff to amsthm package, see below.
---Changed figure placement parameters to be more tolerant.
---Added 8pt, 9pt options (no adjustment of textwidth or margins is done in
sizes other than 10pt; that is left in the hands of the author).
---Added nomath option to suppress loading of amstex package but still
get AMS journal/book style.
---Added noamsfonts option, psamsfonts option (passed on to amsfonts
package qv)
---`pf' and `pf*' environments are now OBSOLETE, see amsthm package
description below.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
amsthm package

---Extends previous capabilities that were present in amsart/amsbook.
Added \newtheorem* for unnumbered theorems, \newtheoremstyle for easy
definition of a custom style.
---New `proof' environment with optional arg to serve instead of pf and
pf*. Default QED symbol is now open square, flush right,
instead of black square with 1em preceding space (following current
style of AMS publications).

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
amsintsm package

---Defines \diffl command (usage \diffl{x}) for printing differentials
(differences of opinion exist about whether the d should be roman or
italic; use of \diffl (`logical markup') allows it to be switched
easily. Likewise \pdiffl (to automatically provide suitable preceding
space) for partial differential.
---Defines \deriv, \pderiv for derivative fractions: \deriv{y}{x}
produces the standard \frac{\diffl{y}}{\diffl{x}}.
---Changes \int to provide better user syntax and better control of
spacing:

  \int[x,a,b]{...} is equivalent to old \int_a^b ...\diffl{x}

If the dx needs to go into the numerator of a fraction, the differenial
argument of \int can be left empty:

  \int[,a,b]{\frac{\diffl{x}}{1+x}}

---Changes \sum to provide better user syntax and better control of
surrounding space:

  \sum[a,b]{...}