#12632: bug comparing trivial Dirichlet characters
-----------------------------+----------------------------------------------
Reporter: bober | Owner: was
Type: PLEASE CHANGE | Status: new
Priority: major | Milestone: sage-5.0
Component: number theory | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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{{{
sage: G1 = DirichletGroup(4)
sage: G2 = DirichletGroup(1)
sage: G2[0] == G1[0].primitive_character()
[...]
ZeroDivisionError: Inverse does not exist.
}}}
(The answer should be {{{True}}}.)
What happens, I think, is that
{{{G1[0].primitive_character().parent().base_ring()}}} is not the same as
{{{G2.base_ring()}}} and something somewhere tries to do some coercion,
and fails:
{{{
sage: G1[0].primitive_character().parent().base_ring()
Cyclotomic Field of order 2 and degree 1
sage: G2.base_ring()
Cyclotomic Field of order 1 and degree 1
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12632>
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