%设定文档类
\documentclass{article}
%调用TikZ绘图包
\usepackage{tikz}
%正文部分
\begin{document}
%开始漫长的公式编辑
$r_3\left(
%设定图形尺寸scale,线宽line width
%以及基准线(否则图形会在括号的上面而不居中显示),下同
\begin{tikzpicture}[scale=.1,line width=0.5pt,baseline=(a.base)]
{
\draw (-2,2) rectangle (-3,3);
}
{
\draw (-1,1) rectangle (-2,2);
\draw (0,0) rectangle (-1,1);
\draw (1,-1) rectangle (2,-2);
\draw (-1,0) rectangle (-2,1);
}
%设定基准线的具体参数
%居中位置(后面的参数需要根据图形大小手动调整)
\node (a) [align=center] {\\[-9pt] };
{
\draw (0,1) rectangle (-1,2);
\draw (1,0) rectangle (2,-1);
\draw (0,0) rectangle (1,-1);
}
\end{tikzpicture}
\right)
=r_2\left(
\begin{tikzpicture}[scale=.1,line width=0.5pt,baseline=(a.base)]
{
\draw (-1,1) rectangle (-2,2);
\draw (0,0) rectangle (-1,1);
\draw (1,-1) rectangle (2,-2);
\draw (-1,0) rectangle (-2,1);
}
\node (a) [align=center] {\\[-5pt] };
{
\draw (0,1) rectangle (-1,2);
\draw (1,0) rectangle (2,-1);
\draw (0,0) rectangle (1,-1);
}
\end{tikzpicture}
\right)
+
r_3\left(
\begin{tikzpicture}[scale=.1,line width=0.5pt,baseline=(a.base)]
{
\draw (-1,1) rectangle (-2,2);
\draw (0,0) rectangle (-1,1);
\draw (1,-1) rectangle (2,-2);
\draw (-1,0) rectangle (-2,1);
}
\node (a) [align=center] {\\[-5pt] };
{
\draw (0,1) rectangle (-1,2);
\draw (1,0) rectangle (2,-1);
\draw (0,0) rectangle (1,-1);
}
\end{tikzpicture}
\right)
$
\end{document}