带有 ntheorem 的假设和子假设

Question

目标是拥有一个可以根据触发器创建以下内容的环境：

假设1答案越好，分数越高。

或者那个

假设2a分数越高，与鞋码越呈正相关。

假设 2b较低的分数与鞋码呈负相关。

我尝试了在Google 群组，并且它有效。但是它会产生一些我不明白的错误消息。请参见下面的最小示例：

\documentclass{article}
\usepackage{ntheorem}
\newtheorem{hyp}{Hypothesis} 
\newcounter{subhyp} 
\newcommand{\subhyp}{ 
  \setcounter{subhyp}{0} 
  \renewcommand\thehyp{\protect\stepcounter{subhyp}% 
  \arabic{hyp}\alph{subhyp}\protect\addtocounter{hyp}{-1}} 
} 
\newcommand{\normhyp}{ 
  \renewcommand\thehyp{\arabic{hyp}} 
  \stepcounter{hyp} 
} 
\begin{document}

\normhyp
\begin{hyp}
The better the answer, the higher the score.
\end{hyp}

\subhyp
\begin{hyp}
Higher score is positive correlated with shoesize.
\end{hyp}

\begin{hyp}
Lower score is negative correlated with shoesize.
\end{hyp}

\end{document}

Answer 1

我会避免滥用\thehyp：例如，如果你想获得一系列假设，你就会遇到麻烦。

hyp我认为，最好的方法是将“子假设”封闭在一个可以改变计数器和一些相关事物的含义的环境中。

\documentclass{article}
\usepackage{ntheorem}
\newtheorem{hyp}{Hypothesis}

\makeatletter
\newcounter{subhyp} 
\let\savedc@hyp\c@hyp
\newenvironment{subhyp}
 {%
  \setcounter{subhyp}{0}%
  \stepcounter{hyp}%
  \edef\saved@hyp{\thehyp}% Save the current value of hyp
  \let\c@hyp\c@subhyp     % Now hyp is subhyp
  \renewcommand{\thehyp}{\saved@hyp\alph{hyp}}%
 }
 {}
\newcommand{\normhyp}{%
  \let\c@hyp\savedc@hyp % revert to the old one
  \renewcommand\thehyp{\arabic{hyp}}%
} 
\makeatother
\begin{document}

\begin{hyp}
The better the answer, the higher the score.
\end{hyp}

\begin{subhyp}
\begin{hyp}
Higher score is positive correlated with shoesize.
\end{hyp}

\begin{hyp}
Lower score is negative correlated with shoesize.
\end{hyp}
\end{subhyp}

\begin{hyp}
Something
\end{hyp}

\begin{subhyp}
\begin{hyp}
Again
\end{hyp}
\begin{hyp}
And again
\end{hyp}
\end{subhyp}

\begin{hyp}
Will it work?
\end{hyp}

\end{document}

如果愿意，您仍然可以使用\subhyp和\normhyp，但最好利用 LaTeX 的群组结构。

Answer 2

如果你使用解决方案，你的代码就可以工作

\protect\addtocounter{subhyp}{1} instead of \stepcounter{subhyp}

另一方面，你可以利用\newtheorem具有有趣的可选参数的命令的优势。基于 Mico 的示例使用：

\newtheorem{hyp}{Hypothesis} 
\newtheorem{subhyp}{Hypothesis}[hyp]

完整代码如下：

\documentclass{article}
\usepackage{ntheorem}
\newtheorem{hyp}{Hypothesis} 
\newtheorem{subhyp}{Hypothesis}[hyp]
\renewcommand\thesubhyp{\thehyp.\alph{subhyp}}

\begin{document}

\begin{hyp}
The better the answer, the higher the score.
\end{hyp}

%\stepcounter{hyp}
%\setcounter{subhyp}{0}
\begin{subhyp}
A higher score is positively correlated with shoesize.
\end{subhyp}

\begin{subhyp}
A lower score is negatively correlated with shoesize.
\end{subhyp}

\begin{hyp}
Pythagoras had something to say.
\end{hyp}

%\setcounter{subhyp}{0} % Don't execute \stepcounter{hyp} in this case.
\begin{subhyp}
Pythagoras contributed something to geometry.
\end{subhyp}

\begin{subhyp}
\emph{Pythagoras} wasn't a single person but a group of like-minded philophers and mathematicians.
\end{subhyp}
\end{document}

Answer 3

与您的代码相比，下面的 MWE 执行以下操作：

• 它定义了一个明确调用的环境subhyp。

• 无需一直输入\normhyp和\subhyp。相反，在开始一组子假设时，您需要输入

  • \stepcounter{hyp}\setcounter{subhyp}{0}

  如果子假设与前面的（主要）假设没有联系，或者

  • \setcounter{subhyp}{0}

  子假设是否应该与前面的（主要）假设共享其主要反对意见。

\documentclass{article}
\usepackage{ntheorem}
\newtheorem{hyp}{Hypothesis} 
\newtheorem{subhyp}{Hypothesis}
   \renewcommand\thesubhyp{\thehyp\alph{subhyp}}

\begin{document}

\begin{hyp}
The better the answer, the higher the score.
\end{hyp}

\stepcounter{hyp}
\setcounter{subhyp}{0}
\begin{subhyp}
A higher score is positively correlated with shoesize.
\end{subhyp}

\begin{subhyp}
A lower score is negatively correlated with shoesize.
\end{subhyp}

\begin{hyp}
Pythagoras had something to say.
\end{hyp}

\setcounter{subhyp}{0} % Don't execute \stepcounter{hyp} in this case.
\begin{subhyp}
Pythagoras contributed something to geometry.
\end{subhyp}

\begin{subhyp}
\emph{Pythagoras} wasn't a single person but a group of like-minded philophers and mathematicians.
\end{subhyp}
\end{document}