[수학함수] max function, min function

 

\begin{align*} max\{a, b\} = \frac{a+b}{2}+\frac{\left|a-b\right|}{2}\end{align*}

 

\begin{align*} min\left\lbrace a, b\right\rbrace = \frac{a+b}{2}-\frac{\left|a-b\right|}{2}\end{align*}