答案1
答案2
我尝试忠实地重现帖子中的图片:
\documentclass{article}
\usepackage{mathtools}
\usepackage{mathptmx}
\usepackage{makebox, bigstrut}
\newcommand\mydot{\makebox*{$ L_{\varepsilon} $}{.}}
\usepackage{array}
\begin{document}
\[%
\setlength\arraycolsep{-1.2pt}
\setlength\extrarowheight{-0.2ex}
\setlength\bigstrutjot{3pt}
\begin{bmatrix}
L_{\varepsilon_1} & & & & & & 0\bigstrut[t]\\
& L_{\varepsilon_2} \\ & & \mydot \\ & & & \mydot \\& & & & \mydot \\
& & & & & L_{\varepsilon_p}\\
& & & & & & A_p {+} \lambda B_p \bigstrut
\end{bmatrix}
\]%
\end{document}