#20896: calling GF(2)**2 breaks CyclicPermutationGroup(10).algebra(GF(5))
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Reporter: dimpase | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-7.3
Component: categories | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by dimpase):
* cc: nthiery (added)
Old description:
> As [https://groups.google.com/d/msg/sage-devel/ip52NUVmmGg/C64qW6lOBQAJ
> reported] on sage-devel
New description:
As [https://groups.google.com/d/msg/sage-devel/ip52NUVmmGg/C64qW6lOBQAJ
reported] on sage-devel
this is fine:
{{{
sage: CyclicPermutationGroup(10).algebra(GF(5))
Group algebra of Cyclic group of order 10 as a permutation group over
Finite Field of size 5
sage: GF(2)^2
Vector space of dimension 2 over Finite Field of size 2
}}}
now, start a new Sage session:
{{{
sage: GF(2)^2
Vector space of dimension 2 over Finite Field of size 2
sage: CyclicPermutationGroup(10).algebra(GF(5))
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
[...]
TypeError: Cannot create a consistent method resolution
order (MRO) for bases FiniteSets.subcategory_class,
VectorSpaces.WithBasis.subcategory_class,
FiniteDimensionalModulesWithBasis.subcategory_class
}}}
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Comment:
Creatures from Sage Import Hell staring at you here...
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Ticket URL: <https://trac.sagemath.org/ticket/20896#comment:1>
Sage <http://www.sagemath.org>
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