public abstract class AMIN
Given a vector x, the i?amin functions return the position of the vector element x[i] that has the smallest
absolute value for real flavors, or the smallest sum |Re(x[i])|+|Im(x[i])| for complex flavors. If n is not
positive, 0 is returned. If more than one vector element is found with the same smallest absolute value,
the index of the first one encountered is returned.