Beta Methods 
The Beta type exposes the following members.
Name  Description  

Function 
Beta function as gamma(a) * gamma(b) / gamma(a+b).
 
Incbcf 
Continued fraction expansion #1 for incomplete beta integral.
 
Incbd 
Continued fraction expansion #2 for incomplete beta integral.
 
Incomplete 
Incomplete (regularized) Beta function Ix(a, b).
 
IncompleteInverse 
Inverse of incomplete beta integral.
 
Log 
Natural logarithm of the Beta function.
 
Multinomial 
Multinomial Beta function.
 
PowerSeries 
Power series for incomplete beta integral. Use when b*x
is small and x not too close to 1.
