Opened 6 years ago
Last modified 7 weeks ago
#20302 new task
Meta-ticket: Improvements to MixedIntegerLinearProgram and its backends — at Version 19
Reported by: | mkoeppe | Owned by: | |
---|---|---|---|
Priority: | major | Milestone: | sage-9.7 |
Component: | numerical | Keywords: | lp |
Cc: | dimpase, vdelecroix, vbraun, jdemeyer, chapoton, fbissey, Rudi, novoselt, moritz, jipilab, mmasdeu, klee, tmonteil, mforets, yzh | Merged in: | |
Authors: | Reviewers: | ||
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | #20296 | Stopgaps: |
Description (last modified by )
Frontend:
- #20304: More error checking in
MixedIntegerLinearProgram
- #19523: defect: Adding constraints for the wrong MILP crashes Sage
- #20331: MIPVariable misreports its dimension (always 1)
- #18733: enhancement:
MixedIntegerLinearProgram
should support tableau-query methods - #18688: task:
MixedIntegerLinearProgram
should support basis status getting/setting
Wishlist tickets:
Improvements to backends:
- #20303: Fixes for
add_variables
in CVXOPT, PPL, GLPK MIP backends andadd_linear_constraints
in CVXOPT - #19525: enhancement: Improve GLPK error handling
- #20332:
CVXOPTBackend
: Set initialproblem_name
- #20337:
MIP backends: obj_constant_term
should be exposed by a backend method - #20323: Common
TestSuite
for MIP backends - #20324: MIP backends: Unify
add_col
,add_variable
- #20325:
GenericBackend
: Add default implementation ofadd_variables
andadd_linear_constraints
- #20326:
GenericBackend
: Fix doctest of add_linear_constraint_vector - #20328: tests related to cplex / gurobi
- #10232: MIP backends should perform bounds checks
New backends:
- #20296:
MixedIntegerLinearProgram
: New backend usingInteractiveLPProblem
- #18735:
MixedIntegerLinearProgram
/HybridBackend
: Reconstruct exact rational/algebraic basic solution - #19219: MILP: Add "CyLP" backend
- #18862: Interface to COIN
OpenSolverInterface
- #10879: add optional SCIP integer constraint solver (dup: #8672)
- #18766: Add bindings,
MixedIntegerLinearProgram
backend to qsopt_ex, a state-of-the-art exact simplex solver
Interactions with InteractiveLinearProgram
and its dictionaries:
- #18734: Construct an
interactive_simplex_method.LPDictionary
from aMixedIntegerLinearProgram
- #20311:
interactive_simplex_method
enhancements - #20203:
LPCleanDictionary
- floating-point helper class for interactive simplex method - #18804:
LPBackendDictionary
- a debugging view of a MIP backend connected tointeractive_simplex_method
Interactions with polyhedra:
- #20301
Polyhedron.to_linear_program
should return the MIP variable used
Change History (19)
comment:1 Changed 6 years ago by
- Description modified (diff)
comment:2 Changed 6 years ago by
- Description modified (diff)
comment:3 Changed 6 years ago by
- Cc vdelecroix added
comment:4 Changed 6 years ago by
- Dependencies set to #20296
comment:5 Changed 6 years ago by
- Description modified (diff)
comment:6 Changed 6 years ago by
- Description modified (diff)
comment:7 Changed 6 years ago by
comment:8 Changed 6 years ago by
- Cc vbraun added
- Description modified (diff)
- Summary changed from Clean up MILP backend interface to Meta-ticket: Improvements to MixedIntegerLinearProgram and its backends
- Type changed from defect to task
comment:9 Changed 6 years ago by
- Description modified (diff)
comment:10 Changed 6 years ago by
- Description modified (diff)
comment:11 Changed 6 years ago by
- Cc jdemeyer added
comment:12 Changed 6 years ago by
- Description modified (diff)
comment:13 Changed 6 years ago by
- Description modified (diff)
comment:14 Changed 6 years ago by
- Description modified (diff)
comment:15 Changed 6 years ago by
- Description modified (diff)
comment:16 Changed 6 years ago by
- Description modified (diff)
comment:17 Changed 6 years ago by
- Description modified (diff)
comment:18 Changed 6 years ago by
- Description modified (diff)
comment:19 Changed 6 years ago by
- Description modified (diff)
Note: See
TracTickets for help on using
tickets.
Description modified to remove my comments about
variable_upper_bound
andvariable_lower_bound
. I was misled by the interface description inGenericBackend
, which was out of sync with the real backends. Fixed in #20296