${\displaystyle {\begin{bmatrix}{\begin{matrix}{\color {grey}\ulcorner }\lambda _{1}&1{\phantom {_{1}}}&{\phantom {\lambda _{1}}}{\color {grey}\urcorner }\\{\phantom {\lambda _{1}}}&\lambda _{1}&1{\phantom {_{1}}}\\{\color {grey}\llcorner }{\phantom {\lambda _{1}}}&{\phantom {\lambda _{1}}}&\lambda _{1}{\color {grey}\lrcorner }\end{matrix}}\\~&{\begin{matrix}{\color {grey}\ulcorner }\lambda _{2}&1{\phantom {_{2}}}{\color {grey}\urcorner }\\{\color {grey}\llcorner }{\phantom {\lambda _{2}}}&\lambda _{2}{\color {grey}\lrcorner }\\\end{matrix}}\\~&~&{\begin{matrix}{\color {grey}[}\lambda _{3}{\color {grey}]}\end{matrix}}\\~&~&~&\ddots \\~&~&~&~&{\begin{matrix}{\color {grey}\ulcorner }\lambda _{n}&1{\phantom {_{n}}}{\color {grey}\urcorner }\\{\color {grey}\llcorner }{\phantom {\lambda _{n}}}&\lambda _{n}{\color {grey}\lrcorner }\\\end{matrix}}\end{bmatrix}}}$

<math>
\begin{bmatrix}
   \begin{matrix}
      {\color{grey}\ulcorner}\lambda_1 & 1\phantom{_1} & \phantom{\lambda_1}{\color{grey}\urcorner} \\
      \phantom{\lambda_1} & \lambda_1 & 1\phantom{_1} \\
      {\color{grey}\llcorner}\phantom{\lambda_1} & \phantom{\lambda_1} & \lambda_1{\color{grey}\lrcorner}
   \end{matrix} \\
   ~ &
   \begin{matrix}
      {\color{grey}\ulcorner}\lambda_2 & 1\phantom{_2}{\color{grey}\urcorner} \\
      {\color{grey}\llcorner}\phantom{\lambda_2} & \lambda_2{\color{grey}\lrcorner} \\
   \end{matrix} \\
   ~ & ~ &
   \begin{matrix}
      {\color{grey}[}\lambda_3{\color{grey}]}
   \end{matrix} \\
   ~ & ~ & ~ & \ddots \\
   ~ & ~ & ~ & ~ & 
   \begin{matrix}
      {\color{grey}\ulcorner}\lambda_n & 1\phantom{_n}{\color{grey}\urcorner} \\
      {\color{grey}\llcorner}\phantom{\lambda_n} & \lambda_n{\color{grey}\lrcorner} \\
   \end{matrix}
\end{bmatrix} 
</math>

描述Jordan blocks.svg	English: An example of a matrix in Jordan normal form. The red blocks are called Jordan blocks.
来源	自己的作品
作者	Jakob.scholbach
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