#3749: [with patch; needs work] Request for a method "is_cyclic" for groups in
SAGE
--------------------------+-------------------------------------------------
Reporter: ljpk | Owner: joyner
Type: defect | Status: new
Priority: minor | Milestone: sage-3.2.2
Component: group_theory | Resolution:
Keywords: |
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Comment (by wdj):
In reply to
{{{
Is this actually necessary:
665 if 1 in edivs:
666 edivs.remove(1)
}}}
As elementary_divisors is implemented:
{{{
sage: J = AbelianGroup([2,3])
sage: J.invariants()
[2, 3]
sage: J.elementary_divisors()
[1, 6]
}}}
But we probably should have
{{{
sage: J = AbelianGroup([2,3])
sage: J.invariants()
[2, 3]
sage: J.elementary_divisors()
[6]
}}}
since you want the elementary divisor of AbelianGroup([2,3]) to be the
same as that of AbelianGroup([6]).
I'll try to fix this too.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/3749#comment:11>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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