
From:  Rodney Sparapani 
Subject:  [Helpgsl] Re: Incomplete Beta function for negative b ? 
Date:  Tue, 29 Aug 2006 16:16:28 0500 
Useragent:  Thunderbird 1.5.0.5 (X11/20060730) 
Lionel B wrote:
Greetings,I need values of gsl_sf_beta_inc (double a, double b, double x) for 0 < a < 1, 1 < b < 0. The incomplete Beta function is, as far as I know, welldefined in this case.I'm a bit stumped  haven't managed to find any identities involving B(z;a,b) that work for me here...
Hi Lionel: I stared at that for way too long before I tried it with Mathematica. It turns out that the result is based on Hypergeometric 2F1 which are available in GSL as well. Rodney
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