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But i will still end up with those error function. Is there any method which will not involve the error functions?

But i will still end up with those error function which i can't evaluate. Is there any method which does not involve the error function?

Homework Statement Consider the wave packet \varphi(k) = \int B(k)cos(kx) dk from 0 to infinity and B(k) = exp(^{-a^{2}k^{2}}). Find \varphi(k) Homework Equations The Attempt at a Solution After looking up integral tables, i got an expression involving error function (erf) and...