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"ZHANG Yan" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Suppose that X is nonnegative continuous random variable with > probability density function f_X(x). > > Now, we have > > A = Integral ( InverseLaplace(g*(s)) f_X(x), 0, INFINITE) What does "*" mean"? I'll remove it in the response below. Do you mean A = Integral ( G(x)* f_X(x), 0, INFINITE) ("*" means multiplication) where G(x) is the inverse L.T. of g(s)? Hope this helps. > where Integral( ..., 0, INFINITE) represents the integral from zero to > positive infinite. InverseLaplace(g*(s)) represents the inverse > laplace of g*(s). > > If A is greater(or less) than zero, then what condition should the > function g*(s) satisfy ? Thank you very much for suggetions. Regards.
