Opened 6 years ago
Closed 5 years ago
#22071 closed defect (wontfix)
Expression._latex_() triggers “dangerous” comparisons
| Reported by: | Marc Mezzarobba | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | sage-duplicate/invalid/wontfix |
| Component: | symbolics | Keywords: | |
| Cc: | Ralf Stephan | Merged in: | |
| Authors: | Reviewers: | ||
| Report Upstream: | N/A | Work issues: | |
| Branch: | Commit: | ||
| Dependencies: | Stopgaps: |
Status badges
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 6 years ago by
comment:2 Changed 5 years ago by
| Milestone: | sage-7.5 → sage-duplicate/invalid/wontfix |
|---|---|
| Status: | new → needs_review |
Seems to be no longer an issue.
comment:3 Changed 5 years ago by
| Status: | needs_review → positive_review |
|---|
comment:4 Changed 5 years ago by
| Resolution: | → wontfix |
|---|---|
| Status: | positive_review → 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.