multi case function in latex
\documentclass{article} \usepackage{amsmath} \usepackage{multirow} \begin{document} \[ X(m,n) = \left\{\begin{array}{@{}lr@{}} \multirow{2}{*}{x(n),} & \text{for }0\leq n\leq 1\\ & \text{or }0\leq n\leq 1\\ x(n-1), & \text{for }0\leq n\leq 1\\ x(n-1), & \text{for }0\leq n\leq 1 \end{array}\right\} = xy \] \end{document}