Gamma Function

Contents
Definition
Weierstrass's Definition
Γ(z) = e-γ z / z Πn = 1 ⋯ ∞(1 + (z / n))-1 ez / n, γ ~ 0.577216 is the Euler–Mascheroni constant. Γ(z) Γ(1 - z) = π / sin(π z), Γ(ε - n) = (-1)n - 1 Γ(-ε) Γ(1 + ε) / Γ(n + 1 + ε). Γ(z) Γ(z + (1 / 2)) = 21 - 2 z (π)1 / 2 Γ(2 z).
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