Opened 6 years ago
Closed 4 years ago
#17879 closed defect (wontfix)
wrong ex.substitution of x*y
Reported by: | rws | Owned by: | |
---|---|---|---|
Priority: | major | Milestone: | sage-duplicate/invalid/wontfix |
Component: | symbolics | Keywords: | |
Cc: | Merged in: | ||
Authors: | Reviewers: | Vincent Delecroix | |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | Stopgaps: |
Description
sage: x,y = var('x,y') sage: f = x*y + x^2*y^2 + x*y^2 sage: f.subs({x*y:u}) x^2*y^2 + x*y^2 + u
This is from http://ask.sagemath.org/question/25972/substitute-xy-by-u/
It seems the current substitution system is not sophisticated enough to get the expected result.
Change History (3)
comment:1 Changed 4 years ago by
- Milestone changed from sage-6.6 to sage-duplicate/invalid/wontfix
- Status changed from new to needs_review
comment:2 Changed 4 years ago by
- Reviewers set to Vincent Delecroix
- Status changed from needs_review to positive_review
It is!
comment:3 Changed 4 years ago by
- Resolution set to wontfix
- Status changed from positive_review to closed
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I think this is a duplicate of #18396.