#16697: implement symbolic lower incomplete gamma function
-------------------------------------+-------------------------------------
Reporter: rws | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.3
Component: symbolics | Resolution:
Keywords: gamma, | Merged in:
incomplete, special, functions | Reviewers:
Authors: | Work issues:
Report Upstream: N/A | Commit:
Branch: | d8d7ee29d7d0f8cf9f884c4403fe5c36cdf3336d
u/rws/implement_symbolic_lower_incomplete_gamma_function| Stopgaps:
Dependencies: |
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Comment (by nbruin):
On [https://groups.google.com/d/msg/sage-support/duiLiYbLNww/i8towxGMOkUJ
sage-support] Rafael Greenblatt reports
{{{
sage: (incomplete_gamma(x,y).diff(x)).simplify()
TypeError: ECL says: Error executing code in Maxima: gamma: wrong number
of arguments.
}}}
The problem probably arises because the function ends up separated from
its arguments:
{{{
sage: incomplete_gamma(x,y).diff(x)
D[0](gamma)(x, y)
}}}
which might confuse the translator (the behaviour is consistent with just
going by strings). The changes here might improve the situation. It's
worth checking.
The following of course works because it does NOT primarily look at
strings:
{{{
sage: from sage.interfaces.maxima_lib import *
sage: maxima_calculus(sr_to_max(incomplete_gamma(x,y).diff(x)))
'diff(gamma_incomplete(x,y),x,1)
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/16697#comment:11>
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