Opened 5 years ago

Last modified 4 weeks ago

#20302 new task

Meta-ticket: Improvements to MixedIntegerLinearProgram and its backends — at Version 10

Reported by: mkoeppe Owned by:
Priority: major Milestone: sage-9.3
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 mkoeppe)

Frontend:

  • #20304: More error checking in MixedIntegerLinearProgram
  • #19523: defect: Adding constraints for the wrong MILP crashes Sage
  • #18733: enhancement: MixedIntegerLinearProgram should support tableau-query methods
  • #18688: task: MixedIntegerLinearProgram should support basis status getting/setting

Backends:

  • #20303: Fixes for add_variables in CVXOPT, PPL, GLPK MIP backends and add_linear_constraints in CVXOPT
  • #19525: enhancement: Improve GLPK error handling
  • #20323: Common TestSuite for MIP backends
  • #20324: MIP backends: Unify add_col, add_variable
  • #20325: GenericBackend: Add default implementation of add_variables and add_linear_constraints
  • #20326: GenericBackend: Fix doctest of add_linear_constraint_vector

Interactions with InteractiveLinearProgram and its dictionaries:

  • #18734: Construct an interactive_simplex_method.LPDictionary from a MixedIntegerLinearProgram
  • #20311: interactive_simplex_method enhancements
  • #20296: MixedIntegerLinearProgram: New backend using InteractiveLPProblem
  • #18735: MixedIntegerLinearProgram/HybridBackend: Reconstruct exact rational/algebraic basic solution
  • #20203: LPCleanDictionary - floating-point helper class for interactive simplex method
  • #18804: LPBackendDictionary - a debugging view of a MIP backend connected to interactive_simplex_method

Interactions with polyhedra:

  • #20301 Polyhedron.to_linear_program should return the MIP variable used

Change History (10)

comment:1 Changed 5 years ago by mkoeppe

  • Description modified (diff)

comment:2 Changed 5 years ago by mkoeppe

  • Description modified (diff)

Description modified to remove my comments about variable_upper_bound and variable_lower_bound. I was misled by the interface description in GenericBackend, which was out of sync with the real backends. Fixed in #20296

Last edited 5 years ago by mkoeppe (previous) (diff)

comment:3 Changed 5 years ago by mkoeppe

  • Cc vdelecroix added

comment:4 Changed 5 years ago by mkoeppe

  • Dependencies set to #20296

comment:5 Changed 5 years ago by mkoeppe

  • Description modified (diff)

comment:6 Changed 5 years ago by mkoeppe

  • Description modified (diff)

comment:7 Changed 5 years ago by vdelecroix

Hello,

I guess that you do not want to fix all of that in one ticket. One possibility is to use this one as a "task ticket" pointing to other tickets. See for example #18846, #17601 or #18333.

comment:8 Changed 5 years ago by mkoeppe

  • 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 5 years ago by mkoeppe

  • Description modified (diff)

comment:10 Changed 5 years ago by mkoeppe

  • Description modified (diff)
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