Returns the smallest element
min(A) min(x,y) min(e(i, ..., j) for i in u, ..., j in v)
The first form returns the smallest element of array expression A.
The second form returns the smallest element of the scalars x and y.
The third form is a reduction expression and returns the smallest value of the scalar expression e(i, ..., j) evaluated for all combinations of i in u, ..., j in v
min(i^2 for i in {3,7,6}) // = 9