#13675: multivariate polynomials lack the inverse_mod(...) method
-------------------------------------------+--------------------------------
Reporter: Bouillaguet | Owner: malb
Type: enhancement | Status: needs_work
Priority: minor | Milestone: sage-5.5
Component: commutative algebra | Resolution:
Keywords: inverse modulo an ideal | Work issues:
Report Upstream: N/A | Reviewers: Marco Streng
Authors: Charles Bouillaguet | Merged in:
Dependencies: #13671 | Stopgaps:
-------------------------------------------+--------------------------------
Changes (by mstreng):
* status: needs_review => needs_work
Comment:
You fixed the output of a test for {{{__invert__}}} in
quotient_ring_element.py, but actually the whole test is incorrect.
The element x mod {{{(x^2+y^2)}}} has no inverse, and this is not because
"extending the base field is implemented yet" as claimed in
quotient_ring_element.py, neither is it because "extending the base field
is *not* implemented yet". This element has no inverse, even if the base
field is extended. This element is simply not invertible. Could you remove
the words "{{{, and extending the base field is implemented yet}}}"?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13675#comment:12>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
