如何在方程式之间获取 vdot

Question

我只是想知道如何加粗我的 vdot，并将它们置于方程式之间。

我正在尝试使用 vdots 跳过部分推导。这是我目前所拥有的：

\documentclass{beamer}

\mode<presentation>
{
  \usetheme{Boadilla}     
  \usecolortheme{wolverine}
  \usefonttheme{structurebold}  
  \setbeamertemplate{navigation symbols}{}
  \setbeamertemplate{caption}[numbered]
\setbeamertemplate{itemize items}[ball]
} 

\usepackage{array,amsmath,booktabs}
\usepackage{amsmath}
\usepackage[version=4]{mhchem}
\usepackage{mathtools}



\begin{document}

\begin{frame}
\begin{align*}
    &\begin{aligned}
    \mathllap{ L(c; \mathbf{x})} &= \pi(\mathbf{x}|c) 
    \end{aligned}\\
    &\begin{aligned}
     &= \{\prod\limits_{i=1}^n h_{v_i}(x(t_{i-1}),c_{v_i})exp\{-h_0(x(t_{i-1}),c)[t_i-t_{i-1}]\} \\
        &\qquad \times exp\{-h_0(x(t_n),c)[T-t_n]\} \\
    \end{aligned}
    \vdots \\
    &\begin{aligned}
    &= \{\prod\limits_{i=1}^n h_{v_i}(x(t_{i-1}),c_{v_i})\}exp\{-\sum\limits_{i=0}^n h_0(x(t_i),c)[t_{i+1}-t_i]\}
    \end{aligned}
\end{align*}
\end{frame}

\end{document}

Answer 1

评论太长了。我不太明白你想用这些aligned环境做什么。这是你要找的吗？我还修复了exp's 并缩放了一些\{...\}

\documentclass{beamer}

\mode<presentation>
{
  \usetheme{Boadilla}     
  \usecolortheme{wolverine}
  \usefonttheme{structurebold}  
  \setbeamertemplate{navigation symbols}{}
  \setbeamertemplate{caption}[numbered]
\setbeamertemplate{itemize items}[ball]
} 

\usepackage{array,amsmath,booktabs}
\usepackage{amsmath}
\usepackage[version=4]{mhchem}
\usepackage{mathtools}



\begin{document}

\begin{frame}
  \begin{align*}
    L(c; \mathbf{x}) &= \pi(\mathbf{x}|c)
    \\
    &= \Bigl\{\prod\limits_{i=1}^n
    h_{v_i}(x(t_{i-1}),c_{v_i})\exp\{-h_0(x(t_{i-1}),c)[t_i-t_{i-1}]\}
    \\
    &\qquad \times \exp\{-h_0(x(t_n),c)[T-t_n]\}
    \\
    \shortvdotswithin{=} % no \\ after this one
    &= \Bigl\{\prod\limits_{i=1}^n
    h_{v_i}(x(t_{i-1}),c_{v_i})\Bigr\}\exp\Bigl\{-\sum\limits_{i=0}^n
    h_0(x(t_i),c)[t_{i+1}-t_i]\Bigr\}
  \end{align*}
\end{frame}

 \end{document}