Beta

Beta(a, b)

Beta function \mathrm{B}.

\forall (a, b) > 0, \quad \mathrm{B}(a, b) = \int_0^1 t^{a-1}(1-t)^{b-1}\di{t}

Parameters:
a, bfloat \in \Rset^*_+
Returns:
resultfloat