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LogGammaRatio(System.Numerics.Complex,System.Numerics.Complex,System.Double)
Method (no overloads)
Summary
ln Γ(k + a) - ln Γ(k + b) for a k of at least a million and an a and b at most half of it, by Stirling's series written as differences, so that nothing
near k ln k is subtracted: (a - b) ln k + (k + a - 1/2) ln(1 + a/k) - (k + b - 1/2) ln(1 + b/k)
- (a - b) and the series' next two terms, whose remainder at k/2 is below 10^-30.
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