<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">%% 
%%  An UIT Edition example
%% 
%%  Example 09-05-1 on page 170.
%% 
%%  Copyright (C) 2010 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{375.57637pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\usepackage{multirow,bigdelim}
\usepackage{amsmath}% Wegen pmatrix
\StopShownPreambleCommands
\begin{document}
\delimitershortfall=-4pt
\[ \begin{pmatrix}
    &amp; x_{11} &amp; x_{12} &amp; \dots &amp; x_{1p} &amp; \rdelim\}{4}{3cm}[some text]\\
   \ldelim[{5}{1cm}[Text] &amp; x_{21} &amp; x_{22} &amp; \dots &amp; x_{2p} \\
    &amp; \vdots\\
    &amp; x_{n_1 1}&amp; x_{n_1 2} &amp; \dots &amp; x_{n_1 p}\\
    &amp; x_{n_1+1,1}&amp;x_{n_1+1,2} &amp; \dots &amp; x_{n_1+1, p} &amp;
         \rdelim\}{3}{3cm}[some more text]\\
     &amp; \vdots\\
     &amp; x_{n_1+n_2, 1} &amp; x_{n_1+n_2,2} &amp; \dots &amp; x_{n_1+n_2,p}\\
     &amp; \vdots \\
   X &amp; - &amp; - &amp;- &amp;- &amp; X
   \end{pmatrix} \]
\end{document}
</pre></body></html>