添加 * 后如何重命名定理

Question

我在 amsthm 中有以下内容：

\newtheoremstyle{thm}
{}                % Space above
{}                % Space below
{}        % Theorem body font % (default is "\upshape")
{}                % Indent amount
{\bfseries}       % Theorem head font % (default is \mdseries)
{.}               % Punctuation after theorem head % default: no punctuation
{ }               % Space after theorem head
{}                % Theorem head spec
\theoremstyle{thm}
\newtheorem*{thm}{Théorème}
\newtheorem{nthm}{Le théorème}

定理名称是法语的，这迫使我们创建两个不同的环境。一个用于编号定理，一个用于未编号定理。我是否可以只创建一个环境（thm 环境），以便当我插入 * 时，名称会自动替换为 Theoreme 而不是 La theoreme？定义其他环境后，上述代码会发生冲突，这就是我要求此替代方案的原因。谢谢。

Answer 1

不清楚问题是什么：看来你只是想要

\newtheorem*{thm*}{Théorème}
\newtheorem{thm}{Le théorème}

完整代码。

\documentclass{article}
\usepackage{amsthm}

\newtheoremstyle{thm}
{}                % Space above
{}                % Space below
{}        % Theorem body font % (default is "\upshape")
{}                % Indent amount
{\bfseries}       % Theorem head font % (default is \mdseries)
{.}               % Punctuation after theorem head % default: no punctuation
{ }               % Space after theorem head
{}                % Theorem head spec

\theoremstyle{thm}
\newtheorem*{thm*}{Théorème}
\newtheorem{thm}{Le théorème}

\begin{document}

\begin{thm}
This is numbered, with no attribution
\end{thm}

\begin{thm}[Euclid]
This is numbered, with attribution
\end{thm}

\begin{thm*}
This is unnumbered, with no attribution
\end{thm*}

\begin{thm*}[Archimedes]
This is unnumbered, with attribution
\end{thm*}

\end{document}

Answer 2

前言：我只是在执行我从问题中理解的内容。不过，我认为定理标题（例如“Le théorème 1”）在法语中听起来有点奇怪。无论如何，客户就是金钱。 :-)

您可以定义两个单独的环境，例如theo和theo*，分别调用nthm或thm。不过，不确定这样做能得到什么好处——也许除了清晰度。

\documentclass{article}
\usepackage{amsthm}

\newtheoremstyle{thm}
  {}                % Space above
  {}                % Space below
  {}                % Theorem body font % (default is "\upshape")
  {}                % Indent amount
  {\bfseries}       % Theorem head font % (default is \mdseries)
  {.}               % Punctuation after theorem head % default: no punctuation
  { }               % Space after theorem head
  {}                % Theorem head spec

\theoremstyle{thm}
\newtheorem*{thm}{Théorème}
\newtheorem{nthm}{Le théorème}

\newenvironment{theo}[1][]{\nthm[#1]}{\endnthm}
\newenvironment{theo*}[1][]{\thm[#1]}{\endthm}

\begin{document}

  \begin{theo}
    This is a numbered theorem.
  \end{theo}

  \begin{theo*}
    This is an unumbered theorem.
  \end{theo*}

  \begin{theo}
    This is another numbered theorem.
  \end{theo}

\end{document}

使用可选参数：

\begin{theo}
  This is a numbered theorem.
\end{theo}

\begin{theo*}[Schreier]
  This is an unumbered theorem.
\end{theo*}

\begin{theo}[Bolzano]
  This is another numbered theorem.
\end{theo}