Opened 4 years ago
Closed 4 years ago
#25276 closed defect (fixed)
Bugs with GradedCommutativeAlgebra
Reported by: | jhpalmieri | Owned by: | |
---|---|---|---|
Priority: | major | Milestone: | sage-8.4 |
Component: | algebra | Keywords: | |
Cc: | mmarco, tscrim | Merged in: | |
Authors: | John Palmieri | Reviewers: | Travis Scrimshaw |
Report Upstream: | N/A | Work issues: | |
Branch: | 2bf55eb (Commits, GitHub, GitLab) | Commit: | 2bf55eb6742f5d0183b3a6f771ea702d012c063e |
Dependencies: | Stopgaps: |
Description
Two bugs with GradedCommutativeAlgebra
:
GradedCommutativeAlgebra(QQ, 'x')
does not work: it seems to not work with only one generator.
- As reported on ask.sagemath.org, homomorphisms don't work.
Change History (11)
comment:1 Changed 4 years ago by
comment:2 Changed 4 years ago by
- Milestone changed from sage-8.3 to sage-8.4
update milestone 8.3 -> 8.4
comment:3 Changed 4 years ago by
- Branch set to u/jhpalmieri/singly-generated-dga
comment:4 Changed 4 years ago by
- Commit set to 79bb0c2ab64477dbe483ed500b276e3d32f18ee5
Here is a branch dealing with the singly generated case. I will move the morphism issue to a separate ticket.
New commits:
79bb0c2 | trac 25276: implement singly generated differental graded commutative algebras
|
comment:5 Changed 4 years ago by
- Status changed from new to needs_review
comment:6 Changed 4 years ago by
See #26027 for morphisms.
comment:7 Changed 4 years ago by
- Reviewers set to Travis Scrimshaw
Can you also add an example for when the generator is even? Otherwise LGTM.
comment:8 Changed 4 years ago by
- Commit changed from 79bb0c2ab64477dbe483ed500b276e3d32f18ee5 to 2bf55eb6742f5d0183b3a6f771ea702d012c063e
Branch pushed to git repo; I updated commit sha1. New commits:
2bf55eb | trac 25276: add one more example
|
comment:9 Changed 4 years ago by
Good idea.
comment:11 Changed 4 years ago by
- Branch changed from u/jhpalmieri/singly-generated-dga to 2bf55eb6742f5d0183b3a6f771ea702d012c063e
- Resolution set to fixed
- Status changed from positive_review to closed
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The first problem is a bug in the construction of
g_algebra
:Looks like a special case with 1 variable is not handled properly on Sage's side, but I am not sure.
The second problem comes from this:
So IMO that is not strictly a bug, but a missing feature.