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+%%
+%% This is file `amsxtra.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% amsxtra.dtx
+%%
+%% Copyright 1995, 1999 American Mathematical Society.
+%% Copyright 2016 LaTeX3 Project and American Mathematical Society.
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3c
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%% https://www.latex-project.org/lppl.txt
+%% and version 1.3c or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `maintained'.
+%%
+%% The Current Maintainer of this work is the LaTeX3 project.
+%%
+\ProvidesPackage{amsxtra}[1999/11/15 v1.2c AMS extra commands]
+\@ifpackageloaded{amstex}{}{%
+ \RequirePackage{amsmath}[1996/10/01 v1.2]}
+\def\sphat{^{\mathchoice{}{}%
+ {\,\,\smash[b]{\hbox{\lower4\ex@\hbox{$\m@th\widehat{\null}$}}}}%
+ {\,\smash[b]{\hbox{\lower3\ex@\hbox{$\m@th\hat{\null}$}}}}}}
+\def\spcheck{^\vee}
+\def\sptilde{^\sim}
+\def\spdot{^{\hbox{\raise\ex@\hbox{\normalfont .}}}}
+\def\spddot{^{\hbox{\raise\ex@\hbox{\normalfont ..}}}}
+\def\spdddot{^{\hbox{\raise\ex@\hbox{\normalfont...}}}}
+\def\spbreve{^{\!\smash[b]{\hbox{\lower4\ex@\hbox{\u{}}}}}}
+\@ifpackageloaded{amstex}{%
+\def\fracwithdelims#1#2{\new@ifnextchar[{\fracwithdelims@#1#2}%
+ {\fracwithdelims@#1#2[\@empty]}}
+\def\fracwithdelims@#1#2[#3]#4#5{\relax
+ \ifx\@empty#3{#4\overwithdelims#1#2#5}\else
+ {#4\abovewithdelims#1#2#3\relax#5}\fi}
+}{}
+\def\accentedsymbol#1#2{%
+ \expandafter\newbox
+ \csname\expandafter\@gobble\string#1@box\endcsname
+ \expandafter\setbox
+ \csname\expandafter\@gobble\string#1@box\endcsname
+ \hbox{$\m@th#2$}%
+ \newcommand{#1}{%
+ \expandafter\copy
+ \csname\expandafter\@gobble\string#1@box\endcsname{}}%
+}
+\def~{\nobreakspace}
+\DeclareRobustCommand{\nobreakspace}{\unskip\nobreak\ \ignorespaces}
+\endinput
+%%
+%% End of file `amsxtra.sty'.