Opened 4 years ago
Closed 3 years ago
#22071 closed defect (wontfix)
Expression._latex_() triggers “dangerous” comparisons
Reported by: | mmezzarobba | Owned by: | |
---|---|---|---|
Priority: | minor | Milestone: | sage-duplicate/invalid/wontfix |
Component: | symbolics | Keywords: | |
Cc: | rws | Merged in: | |
Authors: | Reviewers: | ||
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
With commit a5a1e2b76332d136936c7cbe94cf42f93ec6203d
from ticket #22029:
sage: Mod(2,7)/x 2/x sage: latex(Mod(2,7)/x) ... TypeError: unsupported operand parent(s) for 'lt': 'Ring of integers modulo 7' and 'Number Field in I with defining polynomial x^2 + 1'
It looks like Pynac is comparing the numerator with I
under the hood. Even if the branch in question isn't merged, this is likely to cause problems sooner or later.
Change History (4)
comment:1 Changed 4 years ago by
comment:2 Changed 4 years ago by
- Milestone changed from sage-7.5 to sage-duplicate/invalid/wontfix
- Status changed from new to needs_review
Seems to be no longer an issue.
comment:3 Changed 3 years ago by
- Status changed from needs_review to positive_review
comment:4 Changed 3 years ago by
- Resolution set to wontfix
- Status changed from positive_review to closed
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Note there is a consensus that operations with positive characteristic ring elements and symbolic variables should be discouraged (leading to #21391). Consequently the latexing will fail as well as soon as that is implemented, and you would need something like #10035 to make it work. That doesn't fix this specific odd error but it lowers the urgency level I'm personally having with it.