#12145: Ugly result for exponential integral
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Reporter: mjo | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-4.8
Component: symbolics | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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As reported in this sage-support thread:
http://groups.google.com/group/sage-
support/browse_thread/thread/793c2bdb3db1f02c
We expect,
{{{
sage: integral( x / (exp(x) - 1) , (x,0,oo))
pi^2/6
}}}
but get,
{{{
sage: integral( x / (exp(x) - 1) , (x,0,oo))
-1/6*pi^2 + limit(-1/2*x^2 + x*log(-e^x + 1) + polylog(2, e^x), x,
+Infinity)
}}}
The above might not be incorrect, but it is not very useful either.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12145>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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