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Beta function (Engelsk)

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The beta function with parameters p and q is:

B(p,q) =

⌠
⌡

1

0

x^p−1 (1− x ) ^q−1

It can be written as:

B(p,q) =

Γ(p) Γ(q)

Γ(p+q)

where Γ(t) are gamma functions.