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CD ROM Paradise Collection 4
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CD ROM Paradise Collection 4 1995 Nov.iso
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ERF.KEY
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1993-11-07
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297b
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6 lines
* erf external
erf(x) is the error function of x. It is the probability integral
function or the integral of the Gaussian distribution. erf(x) =
2/sqrt(pi)*inte(exp(-t^2),t,0,x), d(erf(x),x) = 2/sqrt(pi)*e^(-x^2).
See also: ei, gamma, ci, si.