Table of Contents
Matrix:
\begin{bmatrix}0&1&1&0\\0&0&1&0\\…&…&…&..\\…&…&…&..\end{bmatrix}
\(\begin{bmatrix}0&1&1&0\\0&0&1&0\\…&…&…&..\\…&…&…&..\end{bmatrix}\)
\underbrace{}
\widetilde{}
\array or \begin{aligned}
& is used for aligned
my code is: