Talk:Incomplete gamma function

Relation between types?

Question: What is the relation between two definitions of incomplete Gamma functions ? Are they the same ? It seems not. —The preceding unsigned comment was added by 169.229.120.24 (talk • contribs) .

They're not the same, but the relationship between them is

\gamma (a,x)+\Gamma (a,x)=\Gamma (a)\,

. Evil saltine 21:12, 6 May 2006 (UTC)[reply]

Sum or programming solution

Does anyone know if theres are sums that are exactly equal to the incomplete gamma functions? I'm looking for a programming solution for this, and I'd rather not make-shift an approximation. Fresheneesz 19:06, 13 September 2006 (UTC)[reply]

Check out the Abramowitz and Stegun link in the references, Equation 6.5.13. Here's a quick link. See also 6.5.29. PAR 02:18, 14 September 2006 (UTC)[reply]