我可以使用 AMS-Latex AMSTHM 包以两种不同的方式计算定理吗？

Question

AMSTHM 和 AMS latex 总体上可以很好地计算定理。例如“按节编号”或“按子节编号”。为了满足多位作者的需求，我需要同时执行这两个操作。例如：子节计数中的定理 4.2.1.5 可能是按节计数中的定理 4.23。我想使用子节计数，但显示两个计数：定理 4.2.1.5（又名 4.23）。我知道我需要定义一个新的计数器，但我不明白如何才能得到正确的值。任何提示都将不胜感激。

Answer 1

你可以将你的定理封装在另一个环境中，从而改变编号，例如：

\documentclass{article}

\usepackage{amsmath}

\newtheorem{stheorem}{Theorem}[section]
\newcounter{dctheorem}[subsubsection]
\counterwithin{dctheorem}{subsection}
\newenvironment{dctheorem}{%
  \ifnum \value{subsection}>0
    \stepcounter{dctheorem}%
    \ifnum \value{subsubsection}>0
      \renewcommand*{\thestheorem}{\thesubsubsection.\arabic{dctheorem} (aka
        \thesection.\arabic{stheorem})}%
    \else
      \renewcommand*{\thestheorem}{\thesubsection.\arabic{dctheorem} (aka
        \thesection.\arabic{stheorem})}%
    \fi
  \fi
  \stheorem  
}{%
  \endstheorem
}

\begin{document}

\section{Referencing}

See the theorems \ref{th:section}, \ref{th:subsectionA}, \ref{th:subsectionB},
\ref{th:subsubsectionA}, and \ref{th:subsubsectionB}.

\section{Test Section}

\begin{dctheorem}\label{th:section}
  This is a test theorem at section level.
\end{dctheorem}

\subsection{Test Subsection}

\begin{dctheorem}\label{th:subsectionA}
  This is a test theorem at subsection level.
\end{dctheorem}

\subsubsection{Test Subsubsection}

\begin{dctheorem}\label{th:subsubsectionA}
  This is a test theorem at subsubsection level.
\end{dctheorem}

\begin{dctheorem}\label{th:subsubsectionB}
  This is another test theorem at subsubsection level.
\end{dctheorem}

\subsection{Second Test Subsection}

\begin{dctheorem}\label{th:subsectionB}
  This is a test theorem at subsection level.
\end{dctheorem}

\end{document}