Opened 14 months ago
Closed 13 months ago
#29252 closed defect (duplicate)
LU-decomposition inconsistent bewteen Matrix_double_dense and Matrix
Reported by: | gh-toonijn | Owned by: | |
---|---|---|---|
Priority: | major | Milestone: | sage-duplicate/invalid/wontfix |
Component: | linear algebra | Keywords: | matrix LU |
Cc: | Merged in: | ||
Authors: | Reviewers: | Markus Wageringel | |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description (last modified by )
The returned permutation matrix P is in the case of Matrix_double_dense such that: P A = L U
while in the case of Matrix: A = P L U
sage: A = random_matrix(QQ, 4, 4) sage: A.LU()[0] [0 1 0 0] [0 0 0 1] [0 0 1 0] [1 0 0 0] sage: matrix(RDF, A).LU()[0] [0.0 0.0 0.0 1.0] [1.0 0.0 0.0 0.0] [0.0 0.0 1.0 0.0] [0.0 1.0 0.0 0.0]
Change History (4)
comment:1 Changed 14 months ago by
- Description modified (diff)
comment:2 Changed 14 months ago by
- Milestone set to sage-duplicate/invalid/wontfix
- Status changed from new to needs_review
comment:3 Changed 14 months ago by
- Reviewers set to Markus Wageringel
- Status changed from needs_review to positive_review
comment:4 Changed 13 months ago by
- Resolution set to duplicate
- Status changed from positive_review to closed
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This problem should really be resolved. There is already #18365 dealing with it.