#16697: implement symbolic lower incomplete gamma function
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.3
Component: symbolics | Resolution:
Keywords: gamma, incomplete, special, | Merged in:
functions | Reviewers:
Authors: | Work issues:
Report Upstream: N/A | Commit:
Branch: | Stopgaps:
Dependencies: |
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Comment (by nbruin):
We don't need all of `gamma, gamma_inc, incomplete_gamma` as symbolic
function if they all mean the same. Some of them are probably there for
user convenience or because of legacy. I think we want only one spelling
for `gamma_upper`, whatever it may be. The `gamma(a,x)` convention seems
fairly prominent in computer algebra, but is a poor translation of math
notation, where the difference between upper and lower is made with case
(and indeed, the complete gamma function tends to be capital gamma. I
don't think I've ever seen different).
Because of tab completion, you definitely want a binding available that
starts with `gamma`. I'd be fine with `gamma_lower` but if you want to go
with `gamma_lower_incomplete`, that's fine with me too. So, I'd propose
8. Leave upper incomplete gamma as is and implement a symbolic function
`gamma_lower` (or modified spelling) to correspond to maxima's
gamma_greek.
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Ticket URL: <http://trac.sagemath.org/ticket/16697#comment:2>
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