#11143: define symbolic functions for exponential integrals
--------------------------------------------------+-------------------------
Reporter: kcrisman | Owner:
benjaminfjones
Type: defect | Status:
needs_review
Priority: major | Milestone: sage-4.7.2
Component: symbolics | Keywords: ei Ei
special function maxima sd32
Work_issues: | Upstream: N/A
Reviewer: Burcin Erocal, Karl-Dieter Crisman | Author: Benjamin
Jones
Merged: | Dependencies: #11513,
11885
--------------------------------------------------+-------------------------
Changes (by kcrisman):
* dependencies: #11513 => #11513, 11885
Comment:
Impressive work. No guarantees that I'll be able to look through this
long patch with a fine-tooth comb anytime soon, but this will be a great
addition - I really like {{{Ci}}} and {{{Si}}} being in.
{{{
\operatorname{li}(x) = \int_0^z \frac{dt}{\ln(t)} =
\operatorname{Ei}(\ln(x))
}}}
?? What happened to the x in the middle?
Also, what relation does this function bear to {{{Li}}} (I assume it's the
`\int_0` as opposed to `\int_2`, if I recall correctly), and why is that
not mentioned? See #7357. I have to say that the names of the functions
are ... very long. Is there a problem with the fairly standard {{{Li}}}
and {{{li}}}?
See also #3401, though I don't know if that is ''directly'' relevant for
this particular set of functions.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11143#comment:30>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
