Opened 16 months ago
Last modified 3 weeks ago
#28981 new defect
Fix dimension for subscheme of product of projective spaces
Reported by: | gjorgenson | Owned by: | |
---|---|---|---|
Priority: | minor | Milestone: | sage-9.4 |
Component: | algebraic geometry | Keywords: | subscheme |
Cc: | Merged in: | ||
Authors: | Reviewers: | ||
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description (last modified by )
In Sage 9.3.rc0:
sage: PP.<x, y, z, a, b, c> = ProductProjectiveSpaces(QQ, [2, 2]) sage: X = PP.subscheme([x*a, x*b, x*c, y*a, y*b, y*c, z*a, z*b]) sage: X.dimension() # expected: 0 1 sage: X.segre_embedding().codomain().dimension() # correct 0
The answer returned by X.segre_embedding().codomain().dimension()
is correct, as this subscheme is supported on a single point.
The answer returned by X.dimension()
is incorrect.
Change History (5)
comment:1 Changed 16 months ago by
- Component changed from PLEASE CHANGE to algebraic geometry
comment:2 Changed 12 months ago by
- Milestone changed from sage-9.1 to sage-9.2
comment:3 Changed 7 months ago by
- Milestone changed from sage-9.2 to sage-9.3
comment:4 Changed 6 weeks ago by
- Description modified (diff)
- Keywords subscheme added
- Summary changed from Bug with dimension for subschemes of products of projective spaces to Fix dimension for subscheme of product of projective spaces
comment:5 Changed 3 weeks ago by
- Milestone changed from sage-9.3 to sage-9.4
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