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“paracol” 在 beamer 框架内不起作用

tag-icon • tag-icon beamer equations paracol
“paracol” 在 beamer 框架内不起作用

我试图为课堂制作幻灯片。但是在文本右侧插入方程式时遇到了问题。

我的幻灯片的代码：

\documentclass{beamer}
%\documentclass[mathserif]{beamer}
\usefonttheme[onlymath]{serif}
%\usepackage[utf8]{inputenc}
\usepackage{kotex}
\usepackage{mathtools}
\usepackage{paracol}

\setbeamercolor{block title}{use=structure,fg=white,bg=structure.fg!75!black}
\setbeamercolor{block body}{parent=normal text,use=block title,bg=block title.bg!10!bg}

\begin{document}

\begin{frame}{Chapter 2: Introduction}
\begin{itemize}
  \item Notion of a State
    \begin{itemize}
      \item All the information required at $t = t_{0}$ which, together with $u(t),\, t\geq t_{0}$, determines uniquely the output $y(t)$ for $t\geq t_{0}$. \break
    \end{itemize}
  \item Definition of a state (Definition 2.1 Chen p6)
    \begin{definition}
      The state $x(t_{0})$ of a system at time $t_{0}$ is the information at $t_{0}$ that, together with the input $u(t)$, for $t\geq t_{0}$, determines uniquely the output $y(t)$ for all $t\geq t_{0}$.
    \end{definition}
    \begin{itemize}
      \item State vector $x\in R^n$, input vector $u \in R^m$, output vector $y \in R^p$
    \end{itemize}
\begin{paracol}{2}
  \item State equation: $\dot{x} = f(x, u, t)$
  \item Output equation: $y = g(x, u, t)$ 
\switchcolumn
   $$\begin{rcases*}
      x(t_{0}) \\
     u(t), \, t\geq t_{0}
  \end{rcases*} \xrightarrow{} y(t), \, t\geq t_{0}$$
\end{paracol}
\end{itemize}
\end{frame}
\end{document}

然后公式就放在文本下方，而不是右侧。当我复制该paracol部分并将其粘贴到新的 tex 文件中时，它工作正常。我不知道为什么它有问题。

还会出现错误：不在外部 par 模式下。这会影响吗paracol？

答案1

借助 的beamer内置column环境：

在此处输入图片描述

\documentclass{beamer}
\usefonttheme[onlymath]{serif}
\usepackage{mathtools}
\setbeamercolor{block title}{use=structure,fg=white,bg=structure.fg!75!black}
\setbeamercolor{block body}{parent=normal text,use=block title,bg=block title.bg!10!bg}

\begin{document}

\begin{frame}{Chapter 2: Introduction}
\begin{itemize}
  \item Notion of a State
    \begin{itemize}
      \item All the information required at $t = t_{0}$ which, together with $u(t),\, t\geq t_{0}$, determines uniquely the output $y(t)$ for $t\geq t_{0}$. 
    \end{itemize}
  \item Definition of a state (Definition 2.1 Chen p6)
    \begin{definition}
      The state $x(t_{0})$ of a system at time $t_{0}$ is the information at $t_{0}$ that, together with the input $u(t)$, for $t\geq t_{0}$, determines uniquely the output $y(t)$ for all $t\geq t_{0}$.
    \end{definition}
    \begin{itemize}
      \item State vector $x\in R^n$, input vector $u \in R^m$, output vector $y \in R^p$
    \end{itemize}
\end{itemize}
\begin{columns}
  \begin{column}{0.55\textwidth}
    \begin{itemize}
      \item State equation: $\dot{x} = f(x, u, t)$
      \item Output equation: $y = g(x, u, t)$ 
    \end{itemize}
  \end{column}
  \begin{column}{0.45\textwidth}
     \[\begin{rcases*}
        x(t_{0}) \\
       u(t), \, t\geq t_{0}
    \end{rcases*} \xrightarrow{} y(t), \, t\geq t_{0}\]
  \end{column}
\end{columns}
\end{frame}
\end{document}

答案2

问题似乎出在paracol环境内部frame，你可以通过将示例简化到最小来轻松测试

\begin{document}
    \begin{frame}{Intro}
        \begin{paracol}{2}
            A
            \switchcolumn
            B
        \end{paracol}
    \end{frame}
\end{document}

我不知道如何解决这个问题paracol，但既然您的列比是 50:50，那么使用multicol对您有用吗？

\documentclass{beamer}
\usefonttheme[onlymath]{serif}
\usepackage{kotex}
\usepackage{mathtools}
\usepackage{multicol}

\setbeamercolor{block title}{use=structure,fg=white,bg=structure.fg!75!black}
\setbeamercolor{block body}{parent=normal text,use=block title,bg=block title.bg!10!bg}

\begin{document}
    
    \begin{frame}{Chapter 2: Introduction}
        \begin{itemize}
            \item Notion of a State
            \begin{itemize}
                \item All the information required at $t = t_{0}$ which, together with $u(t),\, t\geq t_{0}$, determines uniquely the output $y(t)$ for $t\geq t_{0}$. \break
            \end{itemize}
            \item Definition of a state (Definition 2.1 Chen p6)
            \begin{definition}
                The state $x(t_{0})$ of a system at time $t_{0}$ is the information at $t_{0}$ that, together with the input $u(t)$, for $t\geq t_{0}$, determines uniquely the output $y(t)$ for all $t\geq t_{0}$.
            \end{definition}
            \begin{itemize}
                \item State vector $x\in R^n$, input vector $u \in R^m$, output vector $y \in R^p$
            \end{itemize}
            \begin{multicols}{2}
                \item State equation: $\dot{x} = f(x, u, t)$
                \item Output equation: $y = g(x, u, t)$ 
                
                $$\begin{rcases*}
                    x(t_{0}) \\
                    u(t), \, t\geq t_{0}
                \end{rcases*} \xrightarrow{} y(t), \, t\geq t_{0}$$
            \end{multicols}
        \end{itemize}
    \end{frame}
\end{document}

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