#16697: implement symbolic lower incomplete gamma function
-------------------------------------+-------------------------------------
Reporter: rws | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-pending
Component: symbolics | Resolution:
Keywords: gamma, | Merged in:
incomplete, special, functions | Reviewers: Buck Evan
Authors: Ralf Stephan | Work issues:
Report Upstream: N/A | Commit:
Branch: u/rws/16697-1 | f3be6f16908734f6c6e752578653a3ca09189011
Dependencies: sympy-0.7.7 | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by rws):
Replying to [comment:63 buck]:
> Actually, if I ask pari directly, it gets the correct value, so maybe
the algorithm argument is broken?
>
> {{{
> sage: pari('gamma(25) - incgam(25, 14.5)')
> 4.71197173824555 E21
> sage: pari('incgamc(25, 14.5)')
> 4.71197173824555 E21
> }}}
This works because it uses the gp interface (the libpari might be broken
on our side). Ah, that's two different bugs. However, even if it is in our
interface to libpari and we fix this, or if we use the gp interface, there
is still the unfixed pari bug at
http://pari.math.u-bordeaux.fr/cgi-bin/bugreport.cgi?bug=1689PARI/GP
--
Ticket URL: <http://trac.sagemath.org/ticket/16697#comment:66>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
