#17435: Cythonise path algebra elements
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Reporter: SimonKing | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.5
Component: algebra | Resolution:
Keywords: path algebra | Merged in:
elements | Reviewers:
Authors: Simon King | Work issues:
Report Upstream: N/A | Commit:
Branch: | 99da3361014e5397d8bc24a0ec1e2db1df6014f8
u/SimonKing/cythonise_path_algebra_elements| Stopgaps:
Dependencies: #16453 |
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Comment (by SimonKing):
I just noticed a problem, most likely in `_sub_`:
{{{
sage: P =
DiGraph({1:{1:['x','y','z']}}).path_semigroup().algebra(GF(25,'t'))
sage: P.inject_variables()
Defining e_1, x, y, z
sage: e_1 + 2*x*y*x*z*z*z*x*y - z*z*x*y*z*z*x*y # gives wrong result
e_1 + 3*x*y*x*z*z*z*x*y + 4*z*z*x*y*z*z*x*y
sage: e_1 - z*z*x*y*z*z*x*y + 2*x*y*x*z*z*z*x*y # gives correct result
e_1 + 2*x*y*x*z*z*z*x*y + 4*z*z*x*y*z*z*x*y
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/17435#comment:6>
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