Min[$e_1$, $e_2$, ..., $e_i$]Minimum of a series of values:
Min[4, -8, 1]
Min[E - Pi, Pi, E + Pi, 2 E]
Min flattens lists in its arguments:
Min[{1,2},3,{-3,3.5,-Infinity},{{1/2}}]
Min with symbolic arguments remains in symbolic form:
Min[x, y]
Min[5, x, -3, y, 40]
With no arguments, Min gives Infinity:
Min[]