#18613: Errors with is_isomorphic() for trivial cones
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Reporter: mjo | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: sage-6.9
Component: geometry | Resolution:
Keywords: cone | Merged in:
Authors: Andrey | Reviewers: Michael Orlitzky
Novoseltsev | Work issues:
Report Upstream: N/A | Commit:
Branch: | 40b87be348e7f976614becf8c0cdbbb8fc546fa8
u/novoselt/errors_with_is_isomorphic___for_trivial_cones| Stopgaps:
Dependencies: |
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Comment (by novoselt):
One of the problems why `is_isomorphic` was not working was that
`echelon_form` was not working correctly. After my fix of "just the
mutability issue" there were 20 errors in toric morphisms because a matrix
of rank 2 was now claimed to be of rank 4. Because `echelon_form` was
still not working correctly. And as I've finally realized after making all
tests pass, the handling of the trivial case was wrong as well apart from
mutability. All these things really go together and I'd rather not
separate them, but I've ping the sage-devel thread in case someone else is
willing to take a look.
--
Ticket URL: <http://trac.sagemath.org/ticket/18613#comment:25>
Sage <http://www.sagemath.org>
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