#14196: "subgroups" fails for C1 x C2
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Reporter: mstreng | Owner: malb
Type: defect | Status: new
Priority: major | Milestone: sage-5.8
Component: commutative algebra | Keywords: abelian group
subgroups invfac one
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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In Sage 5.7:
{{{
sage: A = AbelianGroup([2,1])
sage: A
Multiplicative Abelian group isomorphic to C2 x C1
sage: A.subgroups()
[Multiplicative Abelian subgroup isomorphic to C2 generated by {f0},
Trivial Abelian subgroup]
sage: B = AbelianGroup([1,2])
sage: B
Multiplicative Abelian group isomorphic to C1 x C2
sage: B.subgroups()
Vectors not LI: [[0, 0], [0, 1]]
...
ValueError: The given basis vectors must be linearly independent.
}}}
This last command should work just as well as A.subgroups().
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14196>
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