重新标记方程然后重置

Question

我之前问过一个问题，但那是针对案例的。在这里，我想在将标签集重置为默认值之前中途重新标记一些方程式。

代码：

\documentclass[12pt]{beamer}
\usepackage{amsmath}
\usepackage{pgfpages}
\pgfpagesuselayout{resize to}[a4paper,landscape]
%\pgfpagesuselayout{2 on 1}[a4paper]
%\usetheme{Singapore}
\usetheme{Boadilla}
\usepackage{bm}
%\usefonttheme[?options?]{structuresmallcapsserif}
%\definecolor{beamer@blendedblue}{RGB}{203,140,55} % changed this
\definecolor{beamer@blendedblue}{RGB}{0,102,102} % changed this
%\definecolor{beamer@blendedblue}{RGB}{0,153,153} % changed this
\usefonttheme{professionalfonts} %To get the accents aligned correctly, albeit in Computer Modern Roman
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{blocks}[rounded][shadow=true]
\begin{document}
    %-----------------------------------------------------------------New slide ----------------------------------------------------%
    \begin{frame}{Sample}
        \setcounter{equation}{10}
        \begin{equation}
            F = ma
        \end{equation}
        % Starting from here I would like 11a, 11b,...
        \begin{align}
            a + b &= c\\
            d + e &= f
        \end{align}
        \begin{equation}
            a = 1
        \end{equation}
        % Starting from here, I would like 12, 13,..
        \begin{equation}
            f = 5
        \end{equation}
        \begin{equation}
            F = -kx
        \end{equation}
    \end{frame}
\end{document}

输出：

有没有办法冻结当前方程编号n并开始将某些方程标记为(na) (nb)...等等？

Answer 1

您希望subequations；标签对于环境的每次使用都应是唯一的。

\documentclass[12pt]{beamer}
\usepackage{amsmath}
\usepackage{pgfpages}
\pgfpagesuselayout{resize to}[a4paper,landscape]
%\pgfpagesuselayout{2 on 1}[a4paper]
%\usetheme{Singapore}
\usetheme{Boadilla}
\usepackage{bm}
%\usefonttheme[?options?]{structuresmallcapsserif}
%\definecolor{beamer@blendedblue}{RGB}{203,140,55} % changed this
\definecolor{beamer@blendedblue}{RGB}{0,102,102} % changed this
%\definecolor{beamer@blendedblue}{RGB}{0,153,153} % changed this
\usefonttheme{professionalfonts} %To get the accents aligned correctly, albeit in Computer Modern Roman
\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{blocks}[rounded][shadow=true]
\begin{document}
    %-----------------------------------------------------------------New slide ----------------------------------------------------%
    \begin{frame}{Sample}
        \setcounter{equation}{10}
        \begin{subequations}\label{freeze}
        \begin{equation}
            F = ma \tag{\ref{freeze}}
        \end{equation}
        \begin{align}
            a + b &= c\\
            d + e &= f
        \end{align}
        \begin{equation}
            a = 1
        \end{equation}
        \end{subequations}
        % Starting from here, I would like 12, 13,..
        \begin{equation}
            f = 5
        \end{equation}
        \begin{equation}
            F = -kx
        \end{equation}
    \end{frame}
\end{document}