缺少数字，视为零；计量单位非法（插入 pt）

Question

我刚刚遇到这个问题Missing number, treated as zero. [ \begin{Cauchy} ] ，Illegal unit of measure (pt inserted). [ \begin{Cauchy} ] 我知道有人已经遇到过这个问题并且之前已经回答过了，但我的还没有解决，有人能帮帮我吗？代码如下所示。

\documentclass{article}
    \usepackage{pifont}
    \usepackage{enumerate}
    \usepackage{amsmath}
    \usepackage{amsfonts}
    \usepackage{amsthm}
\begin{document}
    \newtheoremstyle{nonum}{}{}{\itshape}{}{\bfseries}{.}
        {}{#1 (\mdseries #3)}
    \theoremstyle{nonum}
    \newtheorem{Cauchy}{Cauchy's Theorem}
    \begin{Cauchy}[Third Version]
        If $G$ is a simply connected open subset of $\mathbb{C}$, then for every closed rectifiable curve $\gamma$ in $G$, we have
        \begin{equation*}
            \int_\gamma f=0.
        \end{equation*}
    \end{Cauchy}
\end{document}

如果能够解决这个问题我将非常感激。

Answer 1

命令的第八个参数\newtheorem必须包含空格或长度。它不能简单地是{}：

\documentclass{article}
\usepackage{pifont}
\usepackage{enumerate}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amsthm}
\newtheoremstyle{nonum}
{}{}
{\itshape}{}
{\bfseries}{.}
{ } % This must contain either a space or a length
{#1 (\mdseries #3)}
\theoremstyle{nonum}

\begin{document}
          \newtheorem{Cauchy}{Cauchy's Theorem}
    \begin{Cauchy}[Third Version]
        If $G$ is a simply connected open subset of $\mathbb{C}$, then for every closed rectifiable curve $\gamma$ in $G$, we have
        \begin{equation*}
            \int_\gamma f=0.
        \end{equation*}
    \end{Cauchy}
\end{document}