#18210: Symbolic computation of Gamma related function crashes Sage
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Reporter: VivianePons | Owner:
Type: PLEASE CHANGE | Status: new
Priority: major | Milestone: sage-6.7
Component: symbolics | Keywords: sd67
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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The following code:
{{{
sage: var('R k')
(R, k)
sage: integrated = -(gamma(1/2*k, 1/2*R*k) - gamma(1/2*k))/gamma(1/2*k)
sage: plot(integrated.subs(k=41), (R,0,6))
}}}
gives a Seg fault error and crashes Sage entirely:
line 134: 4216 Segmentation fault (core dumped)
I believe it comes from the symbolic computation because the following
code is working:
{{{
sage: var('R k')
(R, k)
sage: integrated = -(gamma(1/2*k, 1/2*R*k) - gamma(1/2*k))/gamma(1/2*k)
sage: plot(integrated.subs(k=41.), (R,0,6))
}}}
(Note the 41. instead of 41)
I have no idea where this comes from but it's really bad, because whatever
is going wrong, crashing Sage is bad!
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Ticket URL: <http://trac.sagemath.org/ticket/18210>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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