The numerical version is the one I'm most interested in, so that I can apply this method to my real problem rather than this simple one (where both Mathematica and I can do the integral exactly). the left and right hand sides of the second equation, and a numerical version of the integral. My notebook contains three expressions for the functionį(x)=\int_erfc(1/2x) I also encountered the following problem. It seems though as if that method only stores the value in the RAM- is there a way of permanently enshrining it? What I really want to do is work out the function (which is, incidentally, highly oscillatory ) over some range of values once, and keep a permanent record of the result, preferably in some kind of form I could manipulate as I would any other function.
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