3 files changed, 52 insertions, 5 deletions
diff --git a/Master/texmf-dist/doc/latex/scalerel/scalerel.pdf b/Master/texmf-dist/doc/latex/scalerel/scalerel.pdf
index 64e455e4b8b..1e081a9877c 100644
--- a/Master/texmf-dist/doc/latex/scalerel/scalerel.pdf
+++ b/Master/texmf-dist/doc/latex/scalerel/scalerel.pdf
diff --git a/Master/texmf-dist/doc/latex/scalerel/scalerel.tex b/Master/texmf-dist/doc/latex/scalerel/scalerel.tex
index 45e1673116c..ec38c1b77c8 100644
--- a/Master/texmf-dist/doc/latex/scalerel/scalerel.tex
+++ b/Master/texmf-dist/doc/latex/scalerel/scalerel.tex
@@ -1,5 +1,5 @@
 \documentclass{article}
-\def\version{1.2}
+\def\version{1.3}
 %% Copyright 2013 Steven B. Segletes
 %
 % This work may be distributed and/or modified under the
@@ -18,6 +18,8 @@
 % V1.1  Corrected usepackage dependencies; Significant doc rewrite.
 % V1.11 Corrected typo in documentation
 % V1.2  Added \scaleleftright and \stretchleftright; revised docs.
+% V1.3  Corrected missing % in stretch routines, added \hstretch and
+%       \vstretch commands; fixed version number in .sty file
 \parskip 1em
 \parindent 0em
 \newcommand\rl{\rule{3em}{0in}}
@@ -55,11 +57,13 @@ of which have star variants:
   \scaleto[max_width]{object}{height}
   \stretchto[min_aspect]{object}{height}
 \end{verbatim} 
-In addition, there are two added commands that have been implemented as
+In addition, there are four added commands that have been implemented as
 composites of the four basic commands, they are
 \begin{verbatim}
   \scaleleftright[max_width]{left-obj.}{reference}{right-obj.}
   \stretchleftright[min_aspect]{left-obj.}{reference}{right-obj.}
+  \hstretch{scale}{object}
+  \vstretch{scale}{object}
 \end{verbatim} 
 
 In all cases, \verb|object| is the object to be scaled or vertically
@@ -111,6 +115,12 @@ intended to provide the functional capability of the \verb|\left| and
 \verb|\right| commands in math mode, for delimiting symbols not
 otherwise supported by those commands.
 
+The \verb|\hstretch| and \verb|\vstretch commands| merely take the
+second argument and either horizontally or vertically stretch it by a
+scale factor given by the first argument.  The scale is not given in
+percent, like some aforementioned commands.  Remember also, that these
+commands are, by default processed in math mode.
+
 \section{Usage Examples}
 
 Now for a few examples.  Let us define
@@ -261,6 +271,21 @@ $\scaleleftright[3ex]{\prod}{\blob}{\coprod}$
 \rl\verb|$\stretchleftright[450]{.}{\blob}{\in}$        |
 $\stretchleftright[450]{.}{\blob}{\in}$
 
+\subsection{The $\backslash$\texttt{hstretch} and
+ $\backslash$\texttt{vstretch} Commands}
+
+These commands simply perform horizontal or vertical stretching,
+respectively.  They use a scale factor, rather than an absolute length.
+If the stretch factor is greater than 1, the stretched length is larger
+than the original.  If less than one, it is compressed with respect to
+the original.
+
+\rl\verb|$\otimes\hstretch{3}{\otimes}\hstretch{0.5}{\otimes}$   |
+$\otimes\hstretch{3}{\otimes}\hstretch{0.5}{\otimes}$
+
+\rl\verb|$\otimes\vstretch{3}{\otimes}\vstretch{0.5}{\otimes}$   |
+$\otimes\vstretch{3}{\otimes}\vstretch{0.5}{\otimes}$
+
 \section{Real World Application}
 
 \subsection{White Curly Brackets}
@@ -330,6 +355,22 @@ both normal size and tiny size:
 Note that the brace is the properly formed scale of the normal-sized
 brace in both cases, even as the $x$ adjusts to the fontsize reduction.
 
+If one wanted the default braces narrower (to match the look of the
+comparable symbols in the literature), one could use
+\verb|\hstretch| in the definitions to achieve that quickly as
+\begin{verbatim}
+\def\lxbrace{%
+   \hstretch{0.6}{\scalerel*{\usebox{\lXbrace}}{\llbrace}}}
+\def\rxbrace{%
+   \hstretch{0.6}{\scalerel*{\usebox{\rXbrace}}{\rrbrace}}}
+\end{verbatim}
+
+to give the following
+
+\def\lxbrace{\hstretch{0.6}{\scalerel*{\usebox{\lXbrace}}{\llbrace}}}
+\def\rxbrace{\hstretch{0.6}{\scalerel*{\usebox{\rXbrace}}{\rrbrace}}}
+\indent$\scalerel*{\lxbrace x\rxbrace$\tiny$\lxbrace x\rxbrace}{\wbrace}$
+
 Likewise, the \verb|\left| and \verb|\right| features of equation mode
 cannot be used with the white braces, 
 
diff --git a/Master/texmf-dist/tex/latex/scalerel/scalerel.sty b/Master/texmf-dist/tex/latex/scalerel/scalerel.sty
index 998095a2a45..54beb15dce2 100644
--- a/Master/texmf-dist/tex/latex/scalerel/scalerel.sty
+++ b/Master/texmf-dist/tex/latex/scalerel/scalerel.sty
@@ -1,5 +1,5 @@
 \ProvidesPackage{scalerel}
-[2013/03/11 v1.1
+[2013/03/20 v1.3
  Routines for constrained scaling and stretching of objects,
  relative to a reference object or in absolute terms]
 %% Copyright 2013 Steven B. Segletes
@@ -19,6 +19,8 @@
 % V1.01 Correct typos in documentation
 % V1.1  Corrected usepackage dependencies; Significant doc rewrite.
 % V1.2  Added \scaleleftright and \stretchleftright; revised docs.
+% V1.3  Corrected missing % in stretch routines, added \hstretch and
+%       \vstretch commands; fixed version number in .sty file
 \usepackage{calc}
 \usepackage{graphicx}
 \global\newlength\thesrwidth
@@ -55,7 +57,7 @@
   \setbox0\hbox{$#2$}%
   \setlength\thesrwidth{\wd0}%
   \setlength\thesrheight{\ht0*\ratio{\srblobheight}{\ht0+\dp0}}%
-  \setlength\mnxsrwidth{\thesrheight*100/#1}
+  \setlength\mnxsrwidth{\thesrheight*100/#1}%
   \ifdim\thesrwidth<\mnxsrwidth\setlength\thesrwidth{\mnxsrwidth}\fi%
   \raisebox{-\srblobdepth+\dp0*\ratio{\srblobheight}{\ht0+\dp0}}%
            {\resizebox{\thesrwidth}{\thesrheight}{\usebox{\prebox}}}%
@@ -84,7 +86,7 @@
   \setbox0\hbox{$#2$}%
   \setlength\thesrwidth{\wd0}%
   \setlength\thesrheight{\ht0*\ratio{\srblobheight}{\ht0+\dp0}}%
-  \setlength\mnxsrwidth{\thesrheight*100/#1}
+  \setlength\mnxsrwidth{\thesrheight*100/#1}%
   \ifdim\thesrwidth<\mnxsrwidth\setlength\thesrwidth{\mnxsrwidth}\fi%
   \setlength\srblobdepth{\dp0*\ratio{\srblobheight}{\ht0+\dp0}}%
   \raisebox{-\srblobdepth+\dp0*\ratio{\srblobheight}{\ht0+\dp0}}%
@@ -104,4 +106,8 @@
   \stretchrel[#1]{\leftarg}{#3}\stretchrel*[#1]{\rightarg}{#3}%
 }
 
+\newcommand\hstretch[2]{\stretchrel*{\scalebox{#1}{$#2$}}{#2}}
+
+\newcommand\vstretch[2]{\stretchrel*{#2}{\scalebox{#1}{$#2$}}}
+
 \endinput