#16697: implement symbolic lower incomplete gamma function
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Reporter: rws | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-pending
Component: symbolics | Resolution:
Keywords: gamma, | Merged in:
incomplete, special, functions | Reviewers:
Authors: Ralf Stephan | Work issues:
Report Upstream: N/A | Commit:
Branch: | 5f4a7fbd8598ef3fb22d8cb61d199dfffea23a8c
public/ticket/16697 | Stopgaps:
Dependencies: #17130, |
sympy-0.7.7 |
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Comment (by buck):
I tried to review this (per #18210:18) but quickly got confused. (This
would be a lot easier on github.)
1. Could one of you point me to the doc pertaining to `_sage_`? I did
look, but the [http://www.sagemath.org/doc/developer/coding_in_python.html
#special-sage-functions special sage functions] page doesn't mention it.
2. There are some
[https://github.com/sagemath/sage/blob/master/src/sage/functions/other.py#L1040-L1056
doctests regarding precision] that have been obliterated. Was this
intentional? Why?
3. It seems like this new function (gamma_inc_lower) would be deprecated
as soon as #17722 is implemented. Don't we want to take a minute to figure
out a design that works for both issues?
I think if this patch implemented lower-gamma as a special case of a
single general gamma function we would end up with if statements / edge
cases / opportunities for bugs.
--
Ticket URL: <http://trac.sagemath.org/ticket/16697#comment:47>
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