Redefine command \subjclass[2010]{} to display only "Subject" instead of "Mathematics Subject Classification"?

Question

In an amsart document, how can I redefine the command \subjclass[2010]{} to display only "Subject" instead of "2010 Mathematics Subject Classification"?

Answer 1

Though there should be an easier way to be implemented straight from your article text, I found out a way by which you could change a few lines in the amsart.cls (which you could download and save in the same folder as your .tex file, using a different name like amsartt.cls).

Open amsartt.cls and edit the following lines:

\newcommand{\subjclassname}{%
    \textup{1991} Mathematics Subject Classification}
\@xp\let\csname subjclassname@1991\endcsname \subjclassname
\@namedef{subjclassname@2000}{%
    \textup{2000} Mathematics Subject Classification}
\@namedef{subjclassname@2010}{%
    \textup{2010} Mathematics Subject Classification}

as follows:

\newcommand{\subjclassname}{%
    \textup{} Subject}
\@xp\let\csname subjclassname@1991\endcsname \subjclassname
\@namedef{subjclassname@2000}{%
    \textup{} Subject}
\@namedef{subjclassname@2010}{%
    \textup{} Subject}

Now (repeat:) keeping this new file in the same directory as your tex file, which could look like:

\documentclass{amsartt}

\begin{document}
    \title{A small paper}
    \begin{abstract}
     Changing subject class name.
    \end{abstract}
    \subjclass{Primary 05C38, 15A15; Secondary 05A15, 15A18}

    \maketitle
\end{document}

you get an output which should serve your purpose:

Answer 2

The change to made is a bit hidden. ;-)

\documentclass{amsart}

\makeatletter
\@namedef{subjclassname@1991}{Subject}
\makeatother

\textheight=6cm \calclayout % just to make a smaller picture

\begin{document}

\title{A small paper}
\author{A. Uthor}

\begin{abstract}
Changing subject class name.
\end{abstract}

\subjclass{Primary 05C38, 15A15; Secondary 05A15, 15A18}

\maketitle

\end{document}

A complete setup for all classification years; this way also \subjclass[2010]{...} will just print Subject.

\documentclass{amsart}

\makeatletter
\@namedef{subjclassname@1991}{Subject}
\@namedef{subjclassname@2000}{Subject}
\@namedef{subjclassname@2010}{Subject}
\makeatother

\textheight=6cm \calclayout % just to make a smaller picture

\begin{document}

\title{A small paper}
\author{A. Uthor}

\begin{abstract}
Changing subject class name.
\end{abstract}

\subjclass[2010]{Primary 05C38, 15A15; Secondary 05A15, 15A18}

\maketitle

\end{document}