Opened 8 years ago
Closed 5 years ago
#17879 closed defect (wontfix)
wrong ex.substitution of x*y
Reported by: | rws | Owned by: | |
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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 5 years ago by
Milestone: | sage-6.6 → sage-duplicate/invalid/wontfix |
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Status: | new → needs_review |
comment:2 Changed 5 years ago by
Reviewers: | → Vincent Delecroix |
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Status: | needs_review → positive_review |
It is!
comment:3 Changed 5 years ago by
Resolution: | → wontfix |
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Status: | positive_review → closed |
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I think this is a duplicate of #18396.