#16697: implement symbolic lower incomplete gamma function
-------------------------------------+-------------------------------------
Reporter: rws | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-7.2
Component: symbolics | Resolution:
Keywords: gamma, | Merged in:
incomplete, special, functions |
Authors: Ralf Stephan | Reviewers: Buck Evan
Report Upstream: N/A | Work issues:
Branch: u/rws/16697-2 | Commit:
| 157b268d4ac45de049089e633809f89d2c3ab84e
Dependencies: #20185 | Stopgaps:
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Comment (by paulmasson):
Current 7.3.beta5 Sage builds fine with these modifications. Doctests all
pass. Documentation builds.
Random numeric tests accurate. Function plots. One curious difference from
`gamma_inc`:
{{{
sage: gamma_inc_lower(a,x).diff(x)
x^(a - 1)*e^(-x)
sage: gamma_inc(a,x).diff(x)
D[1](gamma)(a, x)
}}}
Looks good to me. Sympy already updated: any other reason not to merge?
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Ticket URL: <https://trac.sagemath.org/ticket/16697#comment:77>
Sage <http://www.sagemath.org>
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