%%
%% The LaTeX Companion, 3ed
%%
%% Example 11-3-1 on page II-154 in "amsmath, mathtools --- The matrix environments".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.0pt}

%StartShownPreambleCommands
\usepackage{amsmath}
%StopShownPreambleCommands

\begin{document}
\begin{gather*}
  \begin{matrix}  0 &  1 \\ 1 &  0 \end{matrix}  \quad
  \begin{pmatrix} 0 & -i \\ i &  0 \end{pmatrix}
\\[10pt]
  \begin{bmatrix} 0 & -1 \\ 1 &  0 \end{bmatrix} \quad
  \begin{Bmatrix} 1 &  0 \\ 0 & -1 \end{Bmatrix}
\\[10pt]
  \begin{vmatrix} a &  b \\ c &  d \end{vmatrix} \quad
  \begin{Vmatrix} i &  0 \\ 0 & -i \end{Vmatrix}
\end{gather*}
\end{document}