cases (11mar20)

git-svn-id: svn://tug.org/texlive/trunk@54238 c570f23f-e606-0410-a88d-b1316a301751

3 files changed, 16 insertions, 12 deletions

diff --git a/Master/texmf-dist/doc/latex/cases/README b/Master/texmf-dist/doc/latex/cases/README
index ee694332bfb..5ddd34b8a4a 100644
--- a/Master/texmf-dist/doc/latex/cases/README
+++ b/Master/texmf-dist/doc/latex/cases/README
@@ -1,4 +1,4 @@
-cases.sty version 3.0 2020/02/22
+cases.sty version 3.1 2020/03/10
 
 Copyright 1993, 1994, 1995, 2000, 2002, 2020 by Donald Arseneau,
 asnd@triumf.ca, Vancouver, Canada.
diff --git a/Master/texmf-dist/doc/latex/cases/cases.pdf b/Master/texmf-dist/doc/latex/cases/cases.pdf
index 21e48d54ff8..168e8488fc7 100644
--- a/Master/texmf-dist/doc/latex/cases/cases.pdf
+++ b/Master/texmf-dist/doc/latex/cases/cases.pdf
diff --git a/Master/texmf-dist/doc/latex/cases/cases.tex b/Master/texmf-dist/doc/latex/cases/cases.tex
index f2bb343590b..42a2b3efb59 100644
--- a/Master/texmf-dist/doc/latex/cases/cases.tex
+++ b/Master/texmf-dist/doc/latex/cases/cases.tex
@@ -23,9 +23,9 @@
 %\addtokomafont{title}{\rmfamily}
 
 \title{The \pkg{cases} package%
-  \textnormal{\thanks{~~This manual corresponds to \pkg{cases}~v3.0, dated 2020/02/22.}}}
+  \textnormal{\thanks{~~This manual corresponds to \pkg{cases}~v3.1, dated 2020/03/10.}}}
 \author{Donald Arseneau\\\mail{asnd@triumf.ca}}
-\date{Feb 2020}
+\date{Mar 2020}
 
 
 \begin{document}
@@ -69,7 +69,7 @@ case. In a \env{subnumcases} environment, a \cmd{\label} in the \meta{left side}
 equation gives the overall equation number, without any letter. 
 
 To use this package, 
-include "\usepackage{cases}"  after \cmd{\documentclass}, and also after 
+include "\usepackage{cases}" after \cmd{\documentclass}, and also after 
 "\usepackage{amsmath}" if you are using that.
 
 \fancybreak
@@ -89,7 +89,7 @@ this package.
 \item[\opt{subnum}] Force all \env{numcases} environments to be treated as 
     \env{subnumcases}.
 \item[\opt{amsstyle}] For compatibility with \pkg{amsmath}'s \env{cases}, make \env{numcases}
-    use cramped math style ("\textstyle"), and put explanations in the same math style.
+    use cramped math style (\cmd{\textstyle}), and put explanations in the same math style.
 \item[\opt{casesstyle}] Change \pkg{amsmath}'s \env{cases} environment to work in the text/math style
     of \env{numcases}.
 \item[\opt{cases}] Define a \env{cases} environment for use without \pkg{amsmath}. (This 
@@ -114,8 +114,8 @@ A simple example is:
 Giving:
 %
 \begin{numcases} {|x|=}
-  x, & for $x \geq 0$\\
-  -x, & for $x < 0$
+  x, & for $x \geq 0$\label{x}\\
+  -x, & for $x < 0$\label{-x}
 \end{numcases}
 
 \fancybreak
@@ -185,10 +185,14 @@ which produces
 To get this more compact layout with \env{numcases} you can insert "\textstyle" 
 at the beginning of each case, as needed, or use the \pkg{cases} 
 package option \opt{amsstyle}. 
-To have  the \env{cases} environment give the more open layout of eq.~(\ref{weqn}) 
-you can put "\displaystyle" at the beginning of each case, or use the  
-option \opt{casesstyle} for the \pkg{cases} package. (Yes these go with the cases package, they
-are not options for amsmath.)
+To have  the (unnumbered) \env{cases} environment give the more open layout of
+eq.~(\ref{weqn}) you can put "\displaystyle" at the beginning of each case, or use
+the option \opt{casesstyle} for the \pkg{cases} package. (Yes these go with the
+\pkg{cases} package, they are not options for \pkg{amsmath}.)
+
+Another slight difference is that the cases within \env{numcases} can be right-justified by
+inserting \cmd{\hfill} at the beginning of each, which might be desired in rare situations,
+like maybe the absolute value example numbered (\ref{x}) and (\ref{-x}) above.
 
 For full disclosure, even without any relevant package options, cases.sty will 
 slightly adjust the \env{cases} environment from \pkg{amsmath}, by adding a little
@@ -205,6 +209,6 @@ sub-numbering style can be controlled more easily by defining
 \begin{verbatim}
 \renewcommand\thesubequation{\themainequation.\Alph{equation}} % 13.C
 \end{verbatim}
-
+(noting that the counter to reference is `equation' not `subequation').
 
 \end{document}