Opened 8 years ago
Closed 5 years ago
#13696 closed defect (fixed)
process chained equalities with different signs correctly
Reported by: | dimpase | Owned by: | ncohen |
---|---|---|---|
Priority: | major | Milestone: | sage-duplicate/invalid/wontfix |
Component: | linear programming | Keywords: | |
Cc: | vbraun, ppurka, ncohen | Merged in: | |
Authors: | Reviewers: | Jeroen Demeyer | |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | #14540 | Stopgaps: |
Description (last modified by )
we have to deal with what remained from #12091. At least, report errors for the inputs like the following:
sage: p = MixedIntegerLinearProgram() sage: b = p.new_variable() sage: b[0] <= 555*b[1] >= 2 sage: b[0] <= 555*b[1] == 2
which even with #12091 are incorrectly processed
sage: b[0] <= 555*b[1] >= 2 2 <= x_0 <= 555*x_1 sage: b[0] <= 555*b[1] == 2 555*x_1 == 2
Change History (14)
comment:1 Changed 8 years ago by
- Type changed from PLEASE CHANGE to defect
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 5 years ago by
- Description modified (diff)
comment:7 Changed 5 years ago by
- Milestone changed from sage-6.4 to sage-wishlist
comment:8 Changed 5 years ago by
- Dependencies changed from #12091 to #14540
comment:9 Changed 5 years ago by
- Milestone changed from sage-wishlist to sage-7.2
comment:10 Changed 5 years ago by
And how about:
sage: b[0] <= 3 <= 4 <= b[1] 4 <= x_1
comment:11 Changed 5 years ago by
- Milestone changed from sage-7.2 to sage-duplicate/invalid/wontfix
- Reviewers set to Jeroen Demeyer
- Status changed from new to needs_review
comment:12 Changed 5 years ago by
- Status changed from needs_review to positive_review
comment:13 Changed 5 years ago by
comment:14 Changed 5 years ago by
- Resolution set to fixed
- Status changed from positive_review to closed
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Description modified to make the example self-contained.