Opened 10 years ago
Closed 6 years ago
#11697 closed defect (fixed)
global minimal model for elliptic curves in number fields with non-trivial class group
Reported by: | wuthrich | Owned by: | cremona |
---|---|---|---|
Priority: | major | Milestone: | sage-duplicate/invalid/wontfix |
Component: | elliptic curves | Keywords: | global minimal model |
Cc: | Merged in: | ||
Authors: | Reviewers: | Frédéric Chapoton | |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
Currently sage rejects to produce the global minimal Weierstrass equation when the class number is not 1. For instance, this produces an error:
sage: K.<t> = QuadraticField(-5) sage: E = EllipticCurve(K, [0,-1,1,-10,-20]) sage: E.global_minimal_model()
Change History (8)
comment:1 Changed 10 years ago by
comment:2 Changed 8 years ago by
- Milestone changed from sage-5.11 to sage-5.12
comment:3 Changed 7 years ago by
- Milestone changed from sage-6.1 to sage-6.2
comment:4 Changed 7 years ago by
- Milestone changed from sage-6.2 to sage-6.3
comment:5 Changed 7 years ago by
- Milestone changed from sage-6.3 to sage-6.4
comment:6 Changed 6 years ago by
- Status changed from new to needs_review
This can be closed as duplicate, since #18662 does exactly this is.
comment:7 Changed 6 years ago by
- Milestone changed from sage-6.4 to sage-duplicate/invalid/wontfix
- Reviewers set to Frédéric Chapoton
- Status changed from needs_review to positive_review
comment:8 Changed 6 years ago by
- Resolution set to fixed
- Status changed from positive_review to closed
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I know. It has long been on my to-do list to implement a test for existence of a minimal model and give it if it exists. I convinced myself that this would be easy....