v0.5.2

Coluna v0.5.2

Diff since v0.5.1

Closed issues:

• Model parser for tests (#702)
• ERROR: Unexpected variable state during column insertion. (#747)

Merged pull requests:

• Add reformulation parser (#745) (@eduardovegas)
• Improve relax callback (#746) (@artalvpes)
• Replace UserInfo with regular storage. (#748) (@guimarqu)
• Improve relax callback (#750) (@guimarqu)
• Remove UserInfo (#751) (@guimarqu)
• fix bug in colgen when subproblem is infeasible or unbounded (#752) (@guimarqu)

v0.5.1

Coluna v0.5.1

Diff since v0.5.0

Closed issues:

• Time limit (#377)

Merged pull requests:

• add support of open node limit in tree search stopping criterion (#743) (@guimarqu)
• Better implementation of the time limit (#744) (@guimarqu)

v0.5.0

Coluna v0.5.0

Diff since v0.4.2

Closed issues:

• Names for Data/Storage/StorageState (#330)
• Bad practices in tests (#376)
• Branching callback (#403)
• Lack of tests for Preprocessing algorithm (#433)
• Show fractional solution (#672)
• Storage Tests (#701)
• Tree search explore unit tests (#705)
• Storage documentation (#715)
• Reset subsolver parameters before each call to SolveLpForm/SolveIpForm (#732)

Merged pull requests:

• TreeSearch interface (#666) (@guimarqu)
• Tree Search design (#667) (@guimarqu)
• Toy demo in unit tests for TreeSearch interface (#668) (@guimarqu)
• Rework Algorithm interface for new tree search interface (#670) (@guimarqu)
• Tree search interface doc & finish test (#671) (@guimarqu)
• Rm tracker; rm conquer/divide in tree_search; simplifying interface (#673) (@guimarqu)
• Tree search interface v3 (#674) (@guimarqu)
• New storage API (#675) (@guimarqu)
• Decoupling strong branching from tree search data structures (#676) (@guimarqu)
• Support Representatives (#677) (@guimarqu)
• Extract branching rule selection / Start isolating interface from implementation in branching (#678) (@guimarqu)
• Removing branching group (#679) (@guimarqu)
• Remove unused fields from Node and SbNode (#680) (@guimarqu)
• Score interface & simplify children generation (#681) (@guimarqu)
• Refactor strong branching algorithm (#682) (@guimarqu)
• Integrate TreeSearch in the new interface (#683) (@guimarqu)
• Printer search space to print node information before conquer (#684) (@guimarqu)
• Fix some tests (#685) (@guimarqu)
• Node finalizer tests pass (#686) (@guimarqu)
• Tree search API doc (#687) (@guimarqu)
• Simplified version of storage (#688) (@guimarqu)
• Delete old code for storage (#690) (@guimarqu)
• Start simplifying interface built on top of NewStorage/NewRecord (#691) (@guimarqu)
• tree_order only in the printer (#692) (@guimarqu)
• File printer for tree search (#693) (@guimarqu)
• Clarify API on top of storage API (#694) (@guimarqu)
• CompatHelper: add new compat entry for "BlockDecomposition" at version "1.9" (#695) (@github-actions[bot])
• CompatHelper: add new compat entry for "Crayons" at version "4.1" (#696) (@github-actions[bot])
• Move definition of Node in BaB tree search implementation (#697) (@guimarqu)
• Group Algorithm Conquer Divide APIs (#698) (@guimarqu)
• @mustimplement to highlight APIs (#699) (@guimarqu)
• Branching API (#700) (@guimarqu)
• Branching API documentation (#703) (@guimarqu)
• Update index.md (#704) (@jolan99)
• Branching printer (#706) (@guimarqu)
• Split ColCutGenConquer run! method (#707) (@guimarqu)
• Id subtype of Integer (#709) (@guimarqu)
• Replace dynamic sparse vector by a static one in Solution. (#710) (@guimarqu)
• + - * operations for AbstractSolutions & dynamic sparse matrix (#711) (@guimarqu)
• Simplify linear algebra operations syntax in colgen (#712) (@guimarqu)
• DynamicSparseArrays documentation (#713) (@guimarqu)
• Add explore unit tests (#714) (@eduardovegas)
• Add methods to find best solution in storage docs (#716) (@eduardovegas)
• Fix variable of formulation (#718) (@guimarqu)
• doc + code organization in (re)formulation (#719) (@guimarqu)
• 2nd round of refactoring for column generation (#721) (@guimarqu)
• mv cat with partial sol from Algorithms to MOI_interface (#722) (@guimarqu)
• Integrate fixed vars with MOI interface (#723) (@guimarqu)
• Remove partial solution storage unit (#724) (@guimarqu)
• Presolve - Removal of fixed vars (#726) (@guimarqu)
• Fix the double addition of deactivated columns (#727) (@artalvpes)
• Preprocessing algorithm will be replaced by Presolve (#728) (@guimarqu)
• support of custom parameters for subsolvers (#729) (@guimarqu)
• fix colgen with parallelized subproblems (#730) (@guimarqu)
• improve _assert_has_lp_dual_sol error message (#731) (@guimarqu)
• Reset subsolver parameters after optimization (#733) (@guimarqu)
• MoiOptimize loglevel -> 2 (#734) (@guimarqu)
• larger redcost tolerance in colgen & improve error message (#737) (@guimarqu)
• Fix score printing in strong branching (#738) (@guimarqu)
• Don't run conquer on infeasible node (#739) (@guimarqu)
• missing get_priority method for BestDualBound explore strategy (#740) (@guimarqu)
• test BestDualBound explore strategy (#741) (@guimarqu)
• 0.5.0 (#742) (@guimarqu)

v0.4.2

Coluna v0.4.2

Diff since v0.4.1

Closed issues:

• Unexpected variable state during column insertion (#654)

Merged pull requests:

• CompatHelper: add new compat entry for "TOML" at version "1.0" (#653) (@github-actions[bot])
• show reduced cost of column in unexpected state error (#658) (@guimarqu)
• Simplification of ids to allow 1-n mapping between master & sps (#659) (@guimarqu)
• Fast pool sol search (#660) (@artalvpes)
• KnapsackLib -> Knapsacks (#661) (@guimarqu)
• Exclude the cpsat MOI test (#662) (@artalvpes)
• CompatHelper: add new compat entry for "RandomNumbers" at version "1.5" (#663) (@github-actions[bot])
• New error and test for unexpected var state error in colgen (#664) (@guimarqu)
• v0.4.2 (#665) (@guimarqu)

v0.4.1

Coluna v0.4.1

Diff since v0.4.0

Closed issues:

• Add support to provide an initial primal solution (#514)
• Coluna requires the underlying solver to support a modification of the constant in the objective function (#613)
• coluna initialization with generated solution (#614)
• getsolutions (#652)

Merged pull requests:

• smaller examples in documentation (#655) (@guimarqu)
• Initial columns callback (#656) (@guimarqu)
• rm propagation of objective constant in subsolver (#657) (@guimarqu)

v0.4.0

Coluna v0.4.0

Diff since v0.3.12

Closed issues:

• Performance of setprimalsol! (#310)
• MOI tests (#436)
• Possibility to return primal and dual bounds in the pricing callback (#527)
• dantzig-wolfe reaches extreme depths (#556)
• Error in TreeSearchAlgorithm but not SolveIpForm for MILP (#557)
• Constraint on variable overwritten (#583)
• Assessing dual solutions in a subproblem (BlockDecomposition)? (#608)
• Test phase 1 of colgen (#611)
• Follow-up of MOI 0.10.0 upgrade (#620)
• No feasible solution obtained with Coluna (#638)

Merged pull requests:

• CompatHelper: bump compat for "MathOptInterface" to "1.0" (#618) (@github-actions[bot])
• Upgrade to Moi 0.10 (#624) (@guimarqu)
• MOI 0.10 upgrade (#626) (@guimarqu)
• Reorganize tests (#627) (@guimarqu)
• Better support of constraints with single variable (#628) (@guimarqu)
• MOI test_constraint_* pass (#629) (@guimarqu)
• MOI test_model_* pass (#630) (@guimarqu)
• MOI test_variable pass (#631) (@guimarqu)
• MOI test_objective pass (#632) (@guimarqu)
• Support insertion of identical columns at same colgen iteration (#633) (@guimarqu)
• MOI test_modification_ pass (#634) (@guimarqu)
• MOI test_linear & test_solve (#635) (@guimarqu)
• Bounds of variable wrt to kind (#636) (@guimarqu)
• Restore bugfixes tests (#637) (@guimarqu)
• fix & update doc (#639) (@guimarqu)
• Old tests are back (#640) (@guimarqu)
• Transmit dual bound from pricing callback (#641) (@guimarqu)
• upgrade dep to MOI 1.0 (#642) (@guimarqu)
• CompatHelper: add new compat entry for "BlockDecomposition" at version "1.5" (#643) (@github-actions[bot])
• MOI.get for ConstraintDecomposition & VariableDecomposition attributes (#644) (@guimarqu)
• Update BlockDecomposition dep (#645) (@guimarqu)
• fix reset of buffer + deletion of active vars & constrs (#646) (@guimarqu)
• fix critical bug in buffer when changing values in coeff matrix (#647) (@guimarqu)
• DynamicSparseArrays 0.5.3 (#648) (@guimarqu)
• fix pricing callback with caching optimizer + update pricing example in doc (#649) (@guimarqu)
• Retrieve version from Project file (#650) (@guimarqu)
• v0.4.0 (#651) (@guimarqu)

v0.3.12

Coluna v0.3.12

Diff since v0.3.11

Closed issues:

• Move Problem outside MathProg (#439)

Merged pull requests:

• Better support of single variable constraints (#590) (@guimarqu)
• Docstrings in branching algorithms (#606) (@guimarqu)
• Refactor pool of solutions for DwSp & insertion of a column (#609) (@guimarqu)
• Fix bug in strong branching (#612) (@guimarqu)
• create_hash always returns int (#615) (@guimarqu)
• release 0.3.12 (#616) (@guimarqu)
• 0.3.12 (#617) (@guimarqu)

v0.3.11

Coluna v0.3.11

Diff since v0.3.10

Closed issues:

• set dual bound in optimizer_result (#365)
• Some problmens with ColCutGenConquer (#448)
• Shortcut for TreeSearchAlgorithm configuration (#478)
• Bug in strong branching (#601)
• The algorithm terminates with PB = Inf and finite DB (#604)

Merged pull requests:

• Adding Node Finalizer (#568) (@artalvpes)
• Correction of a bug in strong branching (#602) (@rrsadykov)
• Alias for a simplified BCP parameterisation (#603) (@rrsadykov)
• do not multiply sp sol var value by col val (#607) (@guimarqu)
• v0.3.11 (#610) (@guimarqu)

v0.3.10

Coluna v0.3.10

Diff since v0.3.9

Closed issues:

• Not enough tests for set/get of Variables and Constraints (#176)
• Create the original formulation and then the Problem (#268)
• Ref to the pricing setup var in dantzig wolfe sp (#283)
• Bin Packing : Coluna does not find a solution when CPLEX subsolver (#382)
• missing docstring for DefaultRestrictedMasterHeuristic (#460)
• CapacitatedVehicleRouting demo utilization problem (#498)
• can Coluna decompose a general large scale MILP model? (#539)
• Retrieve disagreggated solution (#540)
• warning message in Knapsack custom model test (#541)
• No primal primal bound? (#545)
• Support of JuMP anonymous constraints/variables (#553)
• Benders is not working on a simple example (#554)
• no method matching isless(::Solution, ::Solution) (#555)
• MethodError: no method matching isless (#558)
• JuMP.write_to_file does not work (#559)
• Decompose twice at the same level. (#560)
• Unsupported AffExpr, MathOptInterface.Interval{Float64} (#563)
• Fill mode closed in get MOI.ConstraintFunction for viewing coefmatrix (#575)
• dev doc not generated (#582)
• Access to dual value of constraints of the master problem (#591)
• Dual bound of tree search should be equal to the worst dual bound of open nodes (#597)

Merged pull requests:

• Custom data for variables and constraints (#495) (@guimarqu)
• v0.4.0 (#508) (@guimarqu)
• UnitsUsageDict -> UnitsUsage (#522) (@guimarqu)
• Counting the number of exact calls when testing the pricing stages (#530) (@artalvpes)
• Add bound callback tests (#532) (@laradicp)
• MOI tests: intlinear (#533) (@laradicp)
• Vector of optimizers in Formulation (#534) (@guimarqu)
• Prototyping custom model/optimizer (#535) (@guimarqu)
• Follow up of "custom data" (#538) (@laradicp)
• Custom information about Dantzig-Wolfe subproblems (#542) (@guimarqu)
• docstring for restricted master heuristic (#543) (@guimarqu)
• Refactoring ObjValues & OptimizationState (#544) (@guimarqu)
• Remove negative costs (#546) (@laradicp)
• Retrieve disaggregated solution (#547) (@laradicp)
• Unit tests for OptimizationState (#548) (@laradicp)
• Solutions comparison operators (#549) (@laradicp)
• fix isinteger + continuous columns if sp has only continuous vars (#551) (@guimarqu)
• Use subproblem representatives in column generation (#552) (@laradicp)
• Add isless(::Solution, ::Solution) (#561) (@laradicp)
• Follow up of "custom data": use BlockDecomposition methods customvars! and customconstrs! (#562) (@laradicp)
• Update doc (#564) (@guimarqu)
• rm support of anonymous variables & constraints (#565) (@guimarqu)
• Add support for AffExpr, MathOptInterface.Interval{Float64} (#566) (@laradicp)
• Fix Benders reformulation & algorithm (#567) (@guimarqu)
• Update callbacks documentation (#569) (@guimarqu)
• Documentation of algorithms (#570) (@guimarqu)
• MOI tests: LP unit tests and contlinear tests (#571) (@laradicp)
• Update project of doc (#572) (@guimarqu)
• Dantzig-Wolfe reformulation + identical subproblems (#573) (@guimarqu)
• Documentation for artificial variables (#574) (@guimarqu)
• Don't close fillmode in get terms of constraint (#576) (@guimarqu)
• Note about original form changes (#577) (@guimarqu)
• Fix retrieval of disaggregated solution (#578) (@laradicp)
• Reduce size of Id (#579) (@guimarqu)
• fix CI (#581) (@guimarqu)
• Add MOI methods: delete and modify (#584) (@laradicp)
• Fix ci yaml of documentation (#585) (@guimarqu)
• Fix support of duplicated terms (#586) (@guimarqu)
• MOI linear10 passing (#587) (@guimarqu)
• Rm warnings if cost of artificial vars not provided by the user (#588) (@guimarqu)
• Apply suggestions from PR #584 review (#589) (@laradicp)
• Q&A: why default algorithms do not beat commercial solver ? (#592) (@guimarqu)
• Give access to the dual solution of the master to the user (#594) (@guimarqu)
• 0.3.10 (#595) (@guimarqu)
• dual bound of tree search is dual bound of open nodes (#598) (@guimarqu)
• change FormId type to increase nb formulation limit (#599) (@guimarqu)
• Update deps for 0.4.0 (#600) (@guimarqu)

v0.3.9

Coluna v0.3.9

Diff since v0.3.8

Closed issues:

• Is Coluna possible to call solvers (e.g., Cplex, Gurobi) directly? (#301)
• How to set the coefficients of the objective function with the oracle (#349)
• Incorrect hyperlink to sources in Algorithm references (#405)
• Stable documentation not deployed... (#506)
• Score calculation in strong branching is broken (#512)
• Add support of JuMP.write_to_file in direct mode (#513)
• Branching is performed when a node is infeasible (#520)
• Branching priorities (#521)

Merged pull requests:

• Move storage & records in ColunaBase (#507) (@guimarqu)
• Renaming in storage (#509) (@guimarqu)
• Deletion of AbstractData (#510) (@guimarqu)
• fix strong branching score calculation (#516) (@guimarqu)
• Fix documentation deployment (#517) (@guimarqu)
• Bijection StorageUnit -> Record (#518) (@guimarqu)
• Leave conquer if colgen prunes node (#523) (@guimarqu)
• Add support of JuMP.write_to_file in direct mode (#524) (@laradicp)
• Implementation of column generation stages (#525) (@rrsadykov)
• Add VarBranchingPriority (#526) (@laradicp)
• Support of variable branching priorities in the branching algorithm (#528) (@rrsadykov)
• v0.3.9 (#529) (@guimarqu)