#21112: wrong base ring in sigma_invariants
-------------------------------------+-------------------------------------
Reporter: bhutz | Owner:
Type: defect | Status: needs_work
Priority: minor | Milestone: sage-7.3
Component: algebraic | Resolution:
geometry |
Keywords: | Merged in:
Authors: Ben Hutz | Reviewers: Michelle Manes
Report Upstream: N/A | Work issues:
Branch: u/bhutz/sigma_bug | Commit:
| b7ca29fda6391f31ef52bd622aaa81be478b95b6
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Changes (by mmanes):
* status: needs_review => needs_work
* reviewer: => Michelle Manes
Comment:
{{{
P.<x,y> = ProjectiveSpace(QQ,1)
H = End(P)
f = H([x^2 + y^2, x*y])
f.sigma_invariants(3)
}}}
returns just two values (should be 4)
{{{
P.<x,y> = ProjectiveSpace(QQ,1)
H = End(P)
f = H([x^2 + y^2, x*y])
f.sigma_invariants(1)
}}}
returns "AttributeError: 'sage.rings.integer.Integer' object has no
attribute
'univariate_polynomial'"
--
Ticket URL: <https://trac.sagemath.org/ticket/21112#comment:6>
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