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- Gamma(x)
- Returns Gamma(x).
If x is a positive integer then Gamma(x) = (x-1)!
>>> [int(round(Gamma(n))) for n in range(1,12)]
[1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800]
- IGamma(a, x)
- Returns the incomplete gamma function P(a, x).
Follows _Numerical Recipes in C_, pp 216-219, section 6.2.
- IGammaCF(a, x)
- IGammaSeries(a, x)
- InverseIGamma(a, y, xEpsilon=9.9999999999999995e-08)
- LnGamma(x)
- Returns ln(Gamma(x)).
Follows _Numerical Recipes in C_, pp 213-214, but fixes a couple of errors.
"You can see that this is sort of a take-off on Stirling's approximation, but with a series of corrections that take into account the first few poles in the left complex plane."
- add(...)
- add(a, b) -- Same as a + b.
- div(...)
- div(a, b) -- Same as a / b when __future__.division is not in effect.
- exp(...)
- exp(x)
Return e raised to the power of x.
- fabs(...)
- fabs(x)
Return the absolute value of the float x.
- log(...)
- log(x[, base]) -> the logarithm of x to the given base.
If the base not specified, returns the natural logarithm (base e) of x.
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