ILOG CPLEX C++ API 9.0 Reference Manual

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IloCplex::PWLFormulation IloCplex::PWLFormulation Category Definition File Include Files Synopsis Inner Enumeration ilocplexi.h ilocplex.h PWLFormulation{ LambdaSOS, LambdaBin, Disjunctive, Delta }; Description The enumeration PWLFormulation defines symbolic constants that represent various ways of representing piecewise linear expressions in a MIP. Which of these ways to use is controlled by the method setPWLFormulation. All of these formulations have the same theoretical strength. However, in practice, the effectiveness for solving a particular model may vary dramatically, depending on the formulation being used. These are the various formulations: ◆ ◆ ◆ ◆ Disjunctive, the default, represents a tight formulation of the logical disjunction underlying the function that is being made piecewise linear. LambdaSOS represents a transformation of a piecewise linear expression in which a variable is created for each breakpoint, and a special ordered set of type 2 (SOS2) is added for those variables. LambdaBin represents a transformation of a piecewise linear expression similar to LambdaSOS in which, however, the SOS2 constraint is replaced by a set of linear constraints defined over additional binary variables. Delta indicates a cumulative formulation. Fields LambdaSOS LambdaBin Disjunctive Delta ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 202
IloCplex::PresolveCallbackI IloCplex::PresolveCallbackI Category Inner Class InheritancePath Definition File Include Files ilocplexi.h ilcplex/ilocplex.h protected Constructor Summary PresolveCallbackI() protected IloInt protected IloInt protected IloInt protected IloInt Method Summary getNaggregations() getNmodifiedCoeffs() getNremovedCols() getNremovedRows() Inherited methods from IloCplex::CallbackI CallbackI::abort, CallbackI::duplicateCallback, CallbackI::getEnv, CallbackI::getModel, CallbackI::getNcols, CallbackI::getNQCs, CallbackI::getNrows, CallbackI::main Description An instance of a class derivedf from PresolveCallbackI represents a user-written callback in an application that uses an instance of IloCplex. The callback is called periodically during presolve. This class enables you to access information about the effects of presolve on the model extracted for the instance of IloCplex. For example, there are member functions that return the number of rows or columns removed from the ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 203
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ILOG CPLEX C++ API 9.0 Reference Ma
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T ABLE OF C ONTENTS IloCplex::Branc
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About This Manual This reference ma
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Concepts Branch & Cut IloCplex, lik
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It is possible to tell IloCplex to
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Group optim.cplex.cpp The API of IL
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IloCplex::Algorithm IloCplex::Basis
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ILOFLOAT, for continuous, ILOINT, f
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ILOBARRIERCALLBACK0 ILOBARRIERCALLB
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ILOCONTINUOUSCALLBACK0 ILOCONTINUOU
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ILOCPLEXGOAL0 } return 0; This macr
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ILOCUTCALLBACK0 ILOCUTCALLBACK0 Cat
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ILOFRACTIONALCUTCALLBACK0 ILOFRACTI
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ILOINCUMBENTCALLBACK0 ILOINCUMBENTC
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ILOMIPCALLBACK0 ILOMIPCALLBACK0 Cat
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ILONODECALLBACK0 ILONODECALLBACK0 C
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ILOPROBINGCALLBACK0 ILOPROBINGCALLB
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ILOSOLVECALLBACK0 ILOSOLVECALLBACK0
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IloCplex IloCplex Category Class In
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IloCplex public IloCplex::CplexStat
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IloCplex public void public void pu
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IloCplex IloCplex::NodeSelect IloCp
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IloCplex Mathematical Programming m
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IloCplex IloCplex effectively treat
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IloCplex classes that allow the use
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IloCplex When IloCplex is not divin
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IloCplex public const IloConstraint
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IloCplex This method deletes all la
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IloCplex to use for the constraint
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IloCplex public IloCplex::CplexStat
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IloCplex Note:CPLEX resizes these a
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IloCplex This method returns the nu
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IloCplex public IloCplex::PWLFormul
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IloCplex public void getValues(cons
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IloCplex This method creates and re
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IloCplex This method sets the prefe
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IloCplex its subgoals. See the conc
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IloCplex::Algorithm IloCplex::Algor
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IloCplex::BarrierCallbackI IloCplex
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IloCplex::BasisStatus IloCplex::Bas
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IloCplex::BoolParam IloCplex::BoolP
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IloCplex::BranchCallbackI IloCplex:
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IloCplex::BranchCallbackI ControlCa
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IloCplex::BranchCallbackI IloCplex:
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IloCplex::BranchCallbackI NodeData
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IloCplex::BranchCallbackI no branch
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IloCplex::BranchDirection IloCplex:
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IloCplex::Callback IloCplex::Callba
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IloCplex::CallbackI IloCplex::Callb
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IloCplex::CallbackI callbacks can a
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Callback::Type Callback::Type Categ
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IloCplex::ContinuousCallbackI Descr
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IloCplex::ControlCallbackI IloCplex
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IloCplex::ControlCallbackI MIPCallb
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IloCplex::ControlCallbackI This met
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IloCplex::ControlCallbackI For each
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ControlCallbackI::IntegerFeasibilit
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IloCplex::CplexStatus See also the
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IloCplex::CrossoverCallbackI IloCpl
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IloCplex::CutCallbackI IloCplex::Cu
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IloCplex::CutCallbackI from a user-
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IloCplex::DisjunctiveCutCallbackI I
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IloCplex::DualPricing IloCplex::Dua
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IloCplex::FlowMIRCutCallbackI IloCp
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IloCplex::FractionalCutCallbackI Il
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IloCplex::Goal IloCplex::Goal Categ
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IloCplex::GoalI IloCplex::GoalI Cat
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IloCplex::GoalI public IloInt publi
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IloCplex::GoalI Methods public void
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IloCplex::GoalI Returns the solutio
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IloCplex::GoalI const IloNumVarArra
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IloCplex::GoalI Returns the branch
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IloCplex::GoalI public IloBool isIn
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GoalI::BranchType GoalI::BranchType
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GoalI::IntegerFeasibilityArray Goal
Page 152 and 153: IloCplex::HeuristicCallbackI protec
Page 154 and 155: IloCplex::HeuristicCallbackI protec
Page 156 and 157: IloCplex::HeuristicCallbackI The pa
Page 158 and 159: IloCplex::IISStatusArray IloCplex::
Page 160 and 161: IloCplex::IncumbentCallbackI MIPCal
Page 162 and 163: IloCplex::IntParam IloCplex::IntPar
Page 164 and 165: IloCplex::IntParam See the referenc
Page 166 and 167: IloCplex::IntParam = CPX_PARAM_COLR
Page 168 and 169: IloCplex::IntParam = CPX_PARAM_FRAC
Page 170 and 171: IloCplex::InvalidCutException IloCp
Page 172 and 173: IloCplex::LazyConstraintCallbackI M
Page 174 and 175: IloCplex::MIPCallbackI protected Il
Page 176 and 177: IloCplex::MIPCallbackI IloCplex::No
Page 178 and 179: IloCplex::MIPCallbackI Returns the
Page 180 and 181: MIPCallbackI::NodeData MIPCallbackI
Page 182 and 183: IloCplex::MIPEmphasisType = CPX_MIP
Page 184 and 185: IloCplex::MultipleObjException IloC
Page 186 and 187: IloCplex::NetworkCallbackI The meth
Page 188 and 189: IloCplex::NodeCallbackI protected v
Page 190 and 191: IloCplex::NodeCallbackI protected I
Page 192 and 193: IloCplex::NodeEvaluator IloCplex::N
Page 194 and 195: IloCplex::NodeEvaluatorI IloCplex::
Page 196 and 197: IloCplex::NodeEvaluatorI branch, 0
Page 198 and 199: IloCplex::NodeSelect IloCplex::Node
Page 200 and 201: IloCplex::NumParam = CPX_PARAM_EPOP
Page 204 and 205: IloCplex::PresolveCallbackI model,
Page 206 and 207: IloCplex::ProbingCallbackI IloCplex
Page 208 and 209: IloCplex::ProbingCallbackI This met
Page 210 and 211: IloCplex::Quality Primalobj, Primal
Page 212 and 213: IloCplex::Quality = CPX_SUM_X SumSc
Page 214 and 215: IloCplex::SearchLimit The default c
Page 216 and 217: IloCplex::SearchLimitI creates a go
Page 218 and 219: IloCplex::SimplexCallbackI ILOG CPL
Page 220 and 221: IloCplex::SolveCallbackI Inherited
Page 222 and 223: IloCplex::SolveCallbackI const IloN
Page 224 and 225: IloCplex::UnknownExtractableExcepti
Page 226 and 227: IloCplex::UserCutCallbackI MIPCallb
Page 228 and 229: IloCplex::VariableSelect Group opti
Page 230 and 231: IloCplex::PWLFormulation IloCplex::
Page 232 and 233: IloCplex::PWLFormulation Descriptio
Page 234 and 235: IloCplex::LazyConstraintCallbackI I
Page 236 and 237: IloCplex::UserCutCallbackI Inherite
Page 238: I NDEX ILOFRACTIONALCUTCALLBACK0 26
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