v0.3.8

Coluna v0.3.8

Diff since v0.3.7

Closed issues:

• Move spMv operation in DynamicSparseArrays (#311)
• Unit tests for Methods related to Solutions (#479)
• Unit tests for Methods related to Bounds (#480)
• Remove methods that are no longer needed or used related to solandbounds.jl (#483)
• Remove Counter (#486)
• ERROR: LoadError: ArgumentError: reducing over an empty collection is not allowed (#488)
• Invalid variable index (#489)

Merged pull requests:

• Remove code for spMv operation in colgen (#475) (@guimarqu)
• Update Formulation docstring (#484) (@laradicp)
• Missing unit tests in Bounds and Solutions (#485) (@ItamarRocha)
• Fix compute tree depth score (#490) (@guimarqu)
• Remove Counter (#491) (@laradicp)
• Writing bound and Solution docstrings (#493) (@ItamarRocha)
• Delete buffer changes when removing variable or constraint (#494) (@laradicp)
• Delete changed_constr_kind from buffer (#496) (@laradicp)
• Update setvar! and setconstr! docstrings (#497) (@laradicp)
• Fix problem formulation (#499) (@mbrachner)
• Fix conditions to restart colgen when using lazy cut gen (#502) (@guimarqu)
• StorageContainer -> Storage & fix arg order for restore_from_records (#503) (@guimarqu)
• v0.3.8 (#504) (@guimarqu)

v0.3.7

Coluna v0.3.7

Diff since v0.3.6

Closed issues:

• Allow OptimizerWithAttributes in parameters (#393)
• Error BestDualBoundStrategy (#414)
• Test that branching file completion is not broken (#416)
• Termination status is infeasible when no primal solution found & node limit reached (#426)
• Problem with Coluna.Algorithm.ColumnGeneration (#449)
• How to set multi threads to Cplex? (#451)
• Cannot optimize a model twice (#458)
• ArgumentError: ModelLike of type CPLEX.Optimizer does not support accessing the attribute MathOptInterface.ConstraintBasisStatus(1) (#465)
• Cannot show model of Coluna.Optimizer (#468)
• no method matching getincumbents(::Coluna.Algorithm.Node) (#476)
• Documentation of Solutions and Bounds. (#481)
• Remove methods that are no longer needed or used related to Solution. (#482)

Merged pull requests:

• Allow optimizer with attributes (#461) (@ItamarRocha)
• Optimize twice (#462) (@laradicp)
• FIX: Subsolvers with Different Parameters. Issue #451 (#463) (@ItamarRocha)
• Fix error BestDualBoundStrategy (#464) (@laradicp)
• Solver ColumnGeneration (#466) (@laradicp)
• #416 tests implemented (#467) (@ItamarRocha)
• Add method to get the number of constraints (#469) (@laradicp)
• rename StorageState -> RecordState (#470) (@guimarqu)
• Rename Storage -> (Storage) Unit (#471) (@guimarqu)
• Rename Record State -> Record (#472) (@guimarqu)
• Uncomment last test of optimize_twice (#473) (@guimarqu)
• Retrieve multiple solutions from SolveIpForm (#474) (@guimarqu)
• v0.3.7 (#487) (@guimarqu)

v0.3.6

Coluna v0.3.6

Diff since v0.3.5

Closed issues:

• Add better error msg if max number of formulations reached (#168)
• Unable to get solver statistics (#384)
• Improve error msg when trying to solve an empty model (#424)
• ArgumentError with Cplex (#446)
• How to use Coluna along with Lazy constraints ? (#450)

Merged pull requests:

• test empty model solution and improve error msg (#447) (@laradicp)
• Robust essential cut (lazy constraint) generation (#452) (@guimarqu)
• Solver statistics (#453) (@laradicp)
• fixing typos and removing discord chat link (#456) (@ItamarRocha)
• Add better error msg if max number of formulations reached (#457) (@laradicp)
• v0.3.6 (#459) (@guimarqu)

v0.3.5

Coluna v0.3.5

Diff since v0.3.4

Closed issues:

• Relax master integrality in algorithm (#223)
• Travis CI is no longer free for open source projects (#418)
• Do not reformulate a non-decomposed model (#425)

Merged pull requests:

• Fixing the branching tree file (#434) (@artalvpes)
• Move CI from travis to github actions (#435) (@guimarqu)
• Basic & MIP unit tests for MOI wrapper (#437) (@guimarqu)
• no reformulation when user does not provide decomposition (#438) (@guimarqu)
• fix MOI.empty! (#440) (@guimarqu)
• Support constant in objective function (#441) (@guimarqu)
• Fix doc deployment, update .gitignore, delete NEWS & appveyor (#442) (@guimarqu)
• Introducing Env (#443) (@guimarqu)
• Fixed a bug when restoring master cuts in strong branching (#444) (@artalvpes)
• v0.3.5 (#445) (@guimarqu)

v0.3.4

Coluna v0.3.4

Diff since v0.3.3

Closed issues:

• sync_solver! too slow (#329)
• Problems with the CVRP demo (#404)
• Reformulation is very time consuming for medium/large model (#406)
• Set a gap limit in B&P (#417)
• Activating smoothing stabilization results in unfeasible solution (#421)

Merged pull requests:

• Increase max nb of formulations + better error message if var/constr … (#415) (@guimarqu)
• gap limit + improve comparison of bounds + MOI.RelativeGap (#419) (@guimarqu)
• Rm unused Params (#422) (@guimarqu)
• Error when no solver provided (#423) (@guimarqu)
• Use matrix fill mode when filling the formulations (#427) (@guimarqu)
• Add doc entry for Coluna parameters (#429) (@guimarqu)
• Use view to get a matrix slice (#430) (@guimarqu)
• Update julia tag bot code (#431) (@guimarqu)
• Release v0.3.4 (#432) (@guimarqu)

v0.3.3

Coluna v0.3.3

Diff since v0.3.2

Merged pull requests:

• new features for 0.4.0 (#400) (@guimarqu)
• Rewriting preprocessing (#401) (@rrsadykov)
• Remove MoiResult & mv optimization of Formulations in Algorithm (#402) (@guimarqu)
• fix bug at the end of TreeSearch (#407) (@guimarqu)
• Minor updates in documentation (#408) (@guimarqu)
• expand & rm macro for update solutions methods of OptimizationState (#409) (@guimarqu)
• SolveIpForm & SolveLpForm refactoring (#410) (@guimarqu)
• Patch release 0.3.3 (#412) (@guimarqu)

v0.3.2

Coluna v0.3.2

Diff since v0.3.1

Closed issues:

• Simple Diving (#42)
• Improve set of statuses on node (#80)
• Function naming decoration to alert for a deepcopy in the body (#232)
• Export Algorithms & Params (#307)
• Bug with low optimality tolerance (#370)
• Names of variables are not informative anymore (#378)
• Update links to jump-dev doc and repo (#379)
• no method matching set_initial_primal_bound!(::Coluna.MathProg.Problem, ::Int64) (#390)

Merged pull requests:

• Rewrite MOI wrapper (#380) (@guimarqu)
• Update links (#383) (@guimarqu)
• CompatHelper: bump compat for "DataStructures" to "0.18" (#386) (@github-actions[bot])
• Simplification of the interface for algorithms (#387) (@rrsadykov)
• Updates for julia 1.5 (#388) (@guimarqu)
• remove algo types in ColCutGenConquer (#389) (@guimarqu)
• Initial bounds are Real (#391) (@guimarqu)
• missing get for SolverName & NumberOfVariables MOI attr (#392) (@guimarqu)
• Improve termination statuses (#394) (@guimarqu)
• Optimality tolerance depending on the algorithm (#395) (@guimarqu)
• Partial solutions (#396) (@rrsadykov)
• Patch release 0.3.2 (#398) (@guimarqu)
• Patch release 0.3.2 (#399) (@guimarqu)

v0.3.1

Coluna v0.3.1

Diff since v0.3.0

Closed issues:

• Attribute MathOptInterface.RawParameter("params") is not supported by the model. (#325)
• Model bridge_constraints = false arg should be optional (#362)
• Error After "using" in Julia 1.0.5 (#373)

Merged pull requests:

• Rm use of Base.@kwdef (#374) (@guimarqu)
• v0.3.1 (#375) (@guimarqu)

v0.3.0

Coluna v0.3.0

Diff since v0.2.0

Closed issues:

• Improve tests (#57)
• Improve ad-hoc pricing solver user experience (#83)
• behaviour of setlb! and setub! (#116)
• Numerical stability (#157)
• Empty Conquer Strategy + NoBranching = infinite loop (#166)
• Add better error msg if max number of formulations reached (#168)
• Cut generation callback (#177)
• Strategy for Problem (#197)
• Dynamic Sparse Matrix (#198)
• Mapping Coluna Vars/Constrs <-> JuMP Vars/Constrs (#206)
• Make Formulation independent of Algorithm (#220)
• MAX_NUM_NODES & OPEN_NODE_LIMIT must be parameters of B&B algo (#226)
• number_of_leaves may return -1 but is used in a log function (#242)
• Store current data in sparse matrix (#248)
• Check if column exists (#249)
• Issue with projection from the reformulation to the original variables (#252)
• Update tests for MOI 0.9.10 (#254)
• Dependency on input parameter values (#257)
• setcurisactive! / activate! / deactivate! : keep only one ? (#264)
• Kind of a constraint in an MOIOptimizer (#266)
• An error when solving cutting stock problem (#302)
• Branch and Price generates already active columns (#312)
• Full Branch and Price instead of restricted master heuristic (#313)
• DwSpSetupVar in master (#314)
• Restricted master is feasible but CPLEX did not return a dual solution (#315)
• set on var/constrs should not be done with the id (#328)
• codecov not working (#332)
• Infeasible master when Gurobi is subsolver (#334)
• Pricing call back not working (#339)
• Sense of a variable (#343)
• TreeSearchAlgorithm infinite branching loop when restricted LP master infeasible (#353)
• Rename ConstrKind Core (#356)
• Does not work with Julia 1.2 (#357)
• Subproblem infeasibility detection broken in colgen (#361)
• Dict not threadsafe ? (#363)
• getters for dw_sp_pricing_lb & ub in Reformulation (#366)

Merged pull requests:

• Update README.md (#212) (@guimarqu)
• Nested enumeration container (#213) (@guimarqu)
• Nested enumeration for VarConstrDuty tree (#214) (@guimarqu)
• @nestedenum : smallest primes for greatest ancestors (#215) (@guimarqu)
• Decouple master and subproblems (#216) (@FD-V)
• ElemDict & Members in Containers (#218) (@guimarqu)
• Create submodule MathProg (#219) (@guimarqu)
• macro to export items of nestedenum (#221) (@guimarqu)
• Rm links between MathProg and algorithms (#222) (@guimarqu)
• Create submodule Algorithm (#225) (@guimarqu)
• Mv Solutions & Bounds in Containers (#227) (@guimarqu)
• Var costs, lbs, and ubs stored in the formulation (#228) (@guimarqu)
• Rm inconsistent set perene data in MOIwrapper (#229) (@guimarqu)
• Ignore vscode file (#230) (@vitornesello)
• Hide VarConstrData (#231) (@guimarqu)
• get/set sense, kind & inc_val (#233) (@guimarqu)
• Update chat badge (#235) (@guimarqu)
• Duty{<:AbstractVarConstr} to move it in Id{<:AbstractVarConstr} (#236) (@guimarqu)
• Remove variable cur data and constraint cur data (#238) (@FD-V)
• Move duty into Id for var and constr (#239) (@FD-V)
• New organisation of algorithms (#240) (@rrsadykov)
• Dynamic Sparse Matrix for coefficient matrix (#241) (@guimarqu)
• Fix #242 (#244) (@guimarqu)
• getname methods for constraints & variables (#245) (@guimarqu)
• Update installation command in doc (#246) (@guimarqu)
• Dynamic sparse vector for solutions (#247) (@guimarqu)
• Fix round in fill primal result (#250) (@guimarqu)
• Install TagBot as a GitHub Action (#251) (@JuliaTagBot)
• Fix projection of dw reformulation to original formulation (#253) (@guimarqu)
• Optimizer builder of MOI 0.9.10 (#255) (@guimarqu)
• Update Coluna parameters (#258) (@guimarqu)
• Print name in solutions (#259) (@guimarqu)
• Change initial value of artificial vars (#260) (@guimarqu)
• Various fixes (#262) (@guimarqu)
• Fix check if column exists (#263) (@guimarqu)
• Print method for duties (nestedenum macro) (#265) (@guimarqu)
• Move parameters (#267) (@guimarqu)
• Keep activate/deactivate, rm setcurisactive (#269) (@guimarqu)
• Remove dead code (#270) (@guimarqu)
• Change name of 'get/set explicit' methods (#271) (@guimarqu)
• Dual sol pool matrix is dynamic sparse (#272) (@guimarqu)
• Introduce AbstractModel (#273) (@guimarqu)
• Abolish ElemDict (#274) (@guimarqu)
• Clean MathProg exports (#275) (@guimarqu)
• Add support of pricing oracles declared from BlockDecomposition (#276) (@guimarqu)
• Pricing oracles (#277) (@guimarqu)
• Introduce pricing oracle callback data (#278) (@guimarqu)
• Draft pricing callback works (#279) (@guimarqu)
• Rename oracle -> pricing (#280) (@guimarqu)
• Update issue templates (#281) (@guimarqu)
• Update readme (#282) (@guimarqu)
• AbstractModel in Solution (#285) (@guimarqu)
• New structures for Solutions & Results (#286) (@guimarqu)
• new struct ObjValues (#287) (@guimarqu)
• Merge OptimizationOutput & OptimizationResult (#288) (@guimarqu)
• MasterIpHeur -> IpForm (#289) (@guimarqu)
• MasterLp -> LpForm (#290) (@guimarqu)
• Update OptimizationInput structure (#291) (@guimarqu)
• rm Incumbents (#292) (@guimarqu)
• Update/add/set methods for solutions in OptimizationResult (#293) (@guimarqu)
• Rename IpForm LpForm -> SolveIpForm SolveLpForm (#294) (@guimarqu)
• fix benders solution updates (#295) (@guimarqu)
• fix logs + docstring for OptimizationResult (#296) (@guimarqu)
• OptimizationResult becomes OptimizationState (#297) (@guimarqu)
• Update documentation (#298) (@guimarqu)
• Create CompatHelper.yml (#299) (@guimarqu)
• CompatHelper: add new compat entry for "Primes" at version "0.4" (#300) (@github-actions[bot])
• Update solveipform.jl (#303) (@YP-Ye)
• Update masteripheur.jl (#304) (@YP-Ye)
• Artificial vars for Equal constraints (#305) (@guimarqu)
• Algo interface in ColunaBase (#306) (@guimarqu)
• Reorganisation of Algorithm submodule (#308) (@rrsadykov)
• Speed up computation of reduced costs (#309) (@guimarqu)
• Fix wrong duty for setupvar in master coeff matrix (#316) (@guimarqu)
• clean tests + loglevel 0 is default printlvl (#317) (@guimarqu)
• Clean dependencies (#318) (@guimarqu)
• colgen : reduced cost tolerance param (#319) (@guimarqu)
• log_level instead logmsg in SolveIpForm (#320) (@guimarqu)
• rm max_num_nodes & max_open_nodes in Params (#321) (@guimarqu)
• Implementation of Storages and StorageStates (#323) (@rrsadykov)
• Representatives of master sol should have master duty (#326) (@guimarqu)
• Fix ColGen algorithm (#327) (@guimarqu)
• clean setvarconstr! (#331) (@guimarqu)
• silent mode for subsolvers (#335) (@guimarqu)
• Create local artifical variables in setconstr! (#336) (@guimarqu)
• Fix activate! (#337) (@guimarqu)
• Update travis file (#338) (@guimarqu)
• Debugging code demo for pricing callback (#340) (@guilhemdupuis)
• Reduced cost method (#342) (@guimarqu)
• Master columns cleanup (#344) (@rrsadykov)
• Multi-threading on solving subproblems (#345) (@dianabarros)
• Add Région Nouvelle-Aquitaine in acknowledgments (#347) (@guimarqu)
• Implementation of smoothing stabilization (#348) (@rrsadykov)
• Start documentation for algorithms (#350) (@guimarqu)
• Option to print branching tree in file (#351) (@guimarqu)
• fix most frac branching + cvrp demo for ci tests (#352) (@guimarqu)
• Print node in branching tree after conquer (#354) (@guimarqu)
• Robust facultative cut generation callback (#355) (@guimarqu)
• add test for cvrp demo (#358) (@guimarqu)
• rm Manifest (#359) (@guimarqu)
• ConstrKind : Core -> Essential (#360) (@guimarqu)
• Detect subproblem infeasibility (#364) (@guimarqu)
• getters & doc for Reformulation (#367) (@guimarqu)
• Finishing automatic smoothing (#368) (@rrsadykov)
• More documentation (#369) (@guimarqu)
• Views for columns and constraints & rm MembersMatrix (#371) (@guimarqu)
• v0.3 (#372) (@guimarqu)

v0.2.0

v0.2.0 (2019-11-27)

Diff since v0.1.1

Closed issues:

• Using filter not a good idea? (#185)
• Optimizer for master problem requires supporting integer variables (#182)
• Single variable objective function (#181)
• No column generated & IP Restricted Master Heuristic finds a feasible solution (#174)
• The error when I add Coluna in Julia 1.2 (#172)
• error getbestprimasol when OptimizationResults empty (#167)
• Add support of identical subproblems (#163)
• Untested behavior if max nb of iterations reached in colgen (#162)
• A better error msg if no underlying solver chosen (#153)
• values of timers not reset (#147)
• wrong bounds in small gap instance (#146)
• Review of GAP basic example in doc (#145)
• Wrong termination status (#136)
• Dual value assert fails in LinQuadOptInterface (#131)
• Variable added to master constraints with wrong coefficients (#128)
• bound changes are wrongly propagated (#121)
• Bounds of convexity constraints in master (#118)
• move function getparent to BD (#110)
• Coefficients matrix does not return constraint when lhs empty (#108)
• Remove functions setalgorithm and getalgorithm from StrategyRecord. (#107)
• getvars(::Formulation) should return a membersvector (#106)
• Formulation is not up-to-date in beginning of apply!(ConquerStrategy) (#105)
• Decomposition: Create pricing setup var in subproblem creation (#104)
• Homogeneous return structure for optimize! functions (#89)
• Solver -> Algorithm (#79)
• Move demos outside Coluna.jl (#73)
• Retrieve objective value and solution value through JuMP/MOI (#64)
• Preprocessing (#62)
• Write a nice readme (#58)
• Make Coluna work with CPLEX (#56)
• Variable & Constraint ids depend on Formulation (#54)
• Remove bound changes in setdown (#53)
• Error tagging new release (#50)
• Move code from eval to treat (#49)
• Update docs (#45)
• Pure phase 1 to Simplex-based colgen (#43)
• Local artificial variables (#41)
• François's review of varconstr (#40)
• user-friendly modeling of multiple subproblems (#38)
• Subroblem membership (#6)

Merged pull requests:

• Bounds on deps (#211) (guimarqu)
• Update doc because bug (#210) (guimarqu)
• Error msg for termination status not covered (#209) (guimarqu)
• fix (#208) (guimarqu)
• Strong branching (#207) (rrsadykov)
• Skip rest mast ip heur if integer var unsupported (#204) (guimarqu)
• Error msg if no optimizer (#203) (guimarqu)
• Update README.md (#202) (guimarqu)
• Update starting guide (#199) (guimarqu)
• Clean deps (#196) (guimarqu)
• Conquer strategies parameters (#194) (guimarqu)
• Colgen algorithm style, params & tests (#193) (guimarqu)
• Strategies : treesearch -> explore (#192) (guimarqu)
• update get multiplicity functions (#191) (guimarqu)
• Update LICENSE.md (#190) (guimarqu)
• Bug report template for issues (#189) (guimarqu)
• Update Members Containers (#187) (guimarqu)
• Use Iterators.filter (#186) (guimarqu)
• Remove old file (#184) (guimarqu)
• Uniformize filter functions (#183) (guimarqu)
• Algos & Strategies params + Benders phases (#180) (guimarqu)
• Update project & manifest (#178) (guimarqu)
• fix empty optimization result + test of infeasible ip restricted master (#173) (guimarqu)
• rm getparent annotations (#171) (guimarqu)
• Fix get of members when no element (#170) (guimarqu)
• update for MOI 0.9 & julia 1.2 (#169) (guimarqu)
• Identical subproblems (#164) (guimarqu)
• Reformulation solver rework (#160) (vitornesello)
• Style preprocessing (#159) (vitornesello)
• style changes (#158) (tbulhoes)
• fix comments by Guillaume (#156) (vitornesello)
• deprecation (#155) (guimarqu)
• Update doc and gap example (#154) (guimarqu)
• WIP : Bug fixing preprocessing (#152) (vitornesello)
• Improve statuses and feasibility determination (#151) (vitornesello)
• small changes to preprocessing tests (#150) (tbulhoes)
• Reset timers at end (#149) (guimarqu)
• Fix primal solution check (#148) (guimarqu)
• Get multiplicity of subproblems from BD (#144) (guimarqu)
• Draft version of Benders algorithm (#143) (FD-V)
• Prepare merge in master (#142) (guimarqu)
• Rm representatives in rhs (#141) (guimarqu)
• rm nb_sequence in vcids (#140) (guimarqu)
• Sp vars bound change (#139) (vitornesello)
• WIP : Feature preprocessing (#138) (vitornesello)
• Tests for preprocessing (#135) (tbulhoes)
• Use LQOI version of the commit where dual assertion was removed (#132) (vitornesello)
• Fix issue #128 (#130) (hhkramer)
• Benders algo start (#127) (FD-V)
• function setrhs! that buffers the change (#126) (tbulhoes)
• Define global strategy in tests (#125) (guimarqu)
• Clone with parameters (#124) (guimarqu)
• fix manifest (#123) (guimarqu)
• Prepare formulation calling apply(::AbstractStrategy) (#120) (vitornesello)
• Bendersalgo (#119) (FD-V)
• Algorithms & strategies doc (#115) (guimarqu)
• Fix Benders draft (#114) (guimarqu)
• Dispatch decomposition using BD tree (#103) (guimarqu)
• Feature ad-hoc pricing solver (#102) (vitornesello)
• Duty types (#101) (guimarqu)
• Define custom optimizer (#100) (vitornesello)
• Benders decomposition (#99) (guimarqu)
• Rename partialsol primalspsol (#98) (guimarqu)
• Benders sep factory (#97) (guimarqu)
• Return several dual sols & check primal status (#96) (guimarqu)
• Benders decomposition draft (#95) (guimarqu)
• add lot sizing test (#94) (guimarqu)
• Introduce AbstractOptimizer (#93) (vitornesello)
• WIP: Ad-hoc pricing solver callback (#92) (vitornesello)
• run tests with only julia 1.1 (#91) (vitornesello)
• Introduce OptimizationResult{S} (#90) (vitornesello)
• Draft of benders separation (#87) (FD-V)
• ColumnGeneration phase one (#86) (vitornesello)
• Cleaning- Remove unused function (#85) (vitornesello)
• Status on node to handle formulation modifications/updates by the algorithms (#84) (vitornesello)
• reduce log + show functions (#82) (vitornesello)
• Improvement of unit tests (#78) (vitornesello)
• MOIWrapper - get obj value + get solution (#77) (vitornesello)
• Move demos in ColunaDemos.jl (#76) (guimarqu)
• Cleaning (#75) (vitornesello)
• Rework tree solver (#74) (vitornesello)
• Maximization bug fixes (#72) (vitornesello)
• WIP: Add support for maximisation (#71) (vitornesello)
• Cleaning: Problem setters + style (#70) (vitornesello)
• Readme update (#68) (vitornesello)
• Strategies rework (#67) (vitornesello)
• Rework FormulationCache (#66) (vitornesello)
• Test form with pure master vars & leq master constr (#65) (guimarqu)
• Replace interface by prepare (#63) (guimarqu)
• Divide & Conquer strategies (#61) (guimarqu)
• deploy doc auto (#60) (guimarqu)
• Update ci (#59) (guimarqu)
• WIP : New Data Structure (#51) (FD-V)