# A = matrix(B) = matrix(C)

I am trying to write it on latex:

But i couldn't! Can anyone help me?

• Welcome to TeX SX! Load amsmath and use the bmatrix environment. – Bernard Nov 4 '17 at 23:36

As Bernard said, it is simple enough using the bmatrix environment.

Code:

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\Huge
$\sigma= \begin{bmatrix} \sigma_{xx} & \sigma_{xy} & \sigma_{xz} \\ \sigma_{xy} & \sigma_{yy} & \sigma_{yz} \\ \sigma_{xz} & \sigma_{yz} & \sigma_{zz} \\ \end{bmatrix}= \begin{bmatrix} \sigma_{xx} & \tau_{xy} & \tau_{xz} \\ \tau_{xy} & \sigma_{yy} & \tau_{yz} \\ \tau_{xz} & \tau_{yz} & \sigma_{zz} \\ \end{bmatrix}$
\end{document}


Yields:

• amsart could change a lot the format. Just load amsmath. – Sigur Nov 5 '17 at 0:33