#11143: define symbolic functions for exponential integrals
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Reporter: kcrisman | Owner:
benjaminfjones
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.2
Component: symbolics | Keywords: ei Ei
special function maxima
Work_issues: | Upstream: N/A
Reviewer: Burcin Erocal, Karl-Dieter Crisman | Author: Benjamin
Jones
Merged: | Dependencies: #11513
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Changes (by kcrisman):
* reviewer: Burcin Erocal => Burcin Erocal, Karl-Dieter Crisman
* dependencies: => #11513
Comment:
A few comment:
* This will conflict (slightly) with #11043, I think. You can help their
cause by doing
{{{
from sage.plot.all import plot
}}}
I believe. The point is making sure we don't import numpy and other
things like that on startup. It's possible that some of the other imports
will have this problem, but hopefully not (?).
* I don't really understand coercion, so I'm reluctant to comment on the
coercion stuff in {{{_eval_}}}, though I'd be glad if you explained that
(I don't recall seeing it in these types of functions before).
* This seems to depend on #11513 still, so I'm adding that. But that
still does not have positive review. Just pointing it out.
* Line 260: {{{ raise NotImplementedError("The derivative of is
only implemented for n = 1, 2, 3, ...") }}} seems to be missing something.
On a cursory reading, this looks really nice. Certainly you should go
ahead with the full reorganization, that will help a lot.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11143#comment:22>
Sage <http://www.sagemath.org>
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