#7516: bug in pickling quotient module over pid
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Reporter: was | Owner: was
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.1
Component: linear algebra | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by was):
NOTE: This bug does not happen for Free modules over ZZ. It's only over
a field where the issue happens.
{{{
sage: V = FreeModule(ZZ, 2)
sage: W = V.submodule([V([1,1])])
sage: Z = W.submodule([])
sage: WmodZ = W / Z
sage: loads(dumps(WmodZ))
Finitely generated module V/W over Integer Ring with invariants (0)
sage: WmodZ(W(0))
(0)
sage: loads(dumps(WmodZ))
Finitely generated module V/W over Integer Ring with invariants (0)
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7516#comment:1>
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