Sfun.Beta Method

Returns the value of the Beta function.

public static double Beta(
double a,
double b
);

A double value specifying the Beta function.

The Beta function is defined to be

$\beta (a,b) = {{\Gamma (a)\Gamma (b)} \over {\Gamma (a + b)}} = \int_0^1 {t^{a - 1} } (1 - t)^{b - 1} dt$

See Gamma for the definition of $\Gamma \left( x \right)$ .

The method Beta requires that both arguments be positive.