Lesson 12: Making Block Matrices in LATEX
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按列分块：
$$ \left[ \begin{array}{c|c|c|c} A & Ab & \cdots & A^{n-1}b \end{array} \right] $$ -
左右分块：
$$ \left[ \begin{array}{cccc|c} a_{11}&a_{12}&\cdots&a_{1n}&b_1\\ a_{21}&a_{22}&\cdots&a_{2n}&b_2\\ \vdots&&\ddots&\vdots&\vdots\\ a_{n1}&a_{n2}&\cdots&a_{nn}&b_n\\ \end{array} \right] $$ -
四个对角：
$$ C= \left[ \begin{array}{c|c} A& B \\ \hline C& D \end{array} \right] $$