The moment generating function M(t) of a random variable X is given by the expectation E(etX). If the given random variable X is discrete with probability mass function p(x), then MX(t)=∑xetxp(x). If the given random variabl...
Examples include the SIGN function in Derive, the signum and piecewise func- tions in Maple V and the UnitStep in Mathematica. 2 Definitions of functions The signum function is defined differently in each of the ma- jor CAS. This is not really surprising given that different ar...