12 #ifndef COUENNEOBJECT_HPP
13 #define COUENNEOBJECT_HPP
15 #include "BonBabSetupBase.hpp"
19 #include "OsiBranchingObject.hpp"
31 #define THRES_ZERO_SYMM 0.8
45 class CouenneCutGenerator;
99 virtual double infeasibility (
const OsiBranchingInformation *info,
int &way)
const;
106 virtual double feasibleRegion (OsiSolverInterface*,
const OsiBranchingInformation*)
const;
110 virtual OsiBranchingObject *
createBranch (OsiSolverInterface*,
111 const OsiBranchingInformation*,
int)
const;
Cut Generator for linear convexifications.
pseudocostMult
type of up/down estimate to return for pseudocosts
const double large_bound
if |branching point| > this, change it
virtual int columnNumber() const
Returns the column index.
void setEstimates(const OsiBranchingInformation *info, CouNumber *infeasibility, CouNumber *brpt) const
set up/down estimates based on branching information
OsiObject for auxiliary variables $w=f(x)$.
enum brSelStrat Strategy() const
return branching point selection strategy
CouNumber alpha_
Combination parameter for the mid-point branching point selection strategy.
virtual double checkInfeasibility(const OsiBranchingInformation *info) const
compute infeasibility of this variable, |w - f(x)|, where w is the auxiliary variable defined as w = ...
void setEstimate(double est, int direction)
set up/down estimate (0 for down, 1 for up).
exprVar * reference_
The (auxiliary) variable this branching object refers to.
enum brSelStrat strategy_
Branching point selection strategy.
bool doFBBT_
shall we do Feasibility based Bound Tightening (FBBT) at branching?
CouNumber feas_tolerance_
feasibility tolerance (equal to that of CouenneProblem)
double downEstimate_
down estimate (to be used in pseudocost)
CouenneProblem * problem_
pointer to Couenne problem
CouNumber minMaxDelta(funtriplet *ft, CouNumber lb, CouNumber ub)
CouNumber lp_clamp() const
Defines safe interval percentage for using LP point as a branching point.
const CouNumber default_alpha
bool doConvCuts_
shall we add convexification cuts at branching?
virtual double feasibleRegion(OsiSolverInterface *, const OsiBranchingInformation *) const
fix (one of the) arguments of reference auxiliary variable
Class for MINLP problems with symbolic information.
const CouNumber closeToBounds
const CouNumber max_pseudocost
virtual double intInfeasibility(double value, double lb, double ub) const
integer infeasibility: min {value - floor(value), ceil(value) - value}
double CouNumber
main number type in Couenne
enum pseudocostMult pseudoMultType_
multiplier type for pseudocost
double upEstimate_
up estimate (to be used in pseudocost)
~CouenneObject()
Destructor.
CouenneObject()
empty constructor (for unused objects)
exprVar * Reference() const
return reference auxiliary variable
virtual double downEstimate() const
Return "down" estimate (for non-convex, distance old <–> new LP point)
CouNumber midInterval(CouNumber x, CouNumber l, CouNumber u, const OsiBranchingInformation *info=NULL) const
returns a point "inside enough" a given interval, or x if it already is.
CouenneCutGenerator * cutGen_
pointer to cut generator (not necessary, can be NULL)
virtual CouenneObject * clone() const
Cloning method.
CouNumber lp_clamp_
Defines safe interval percentage for using LP point as a branching point.
branch_obj
type of object (for branching variable selection)
CouNumber getBrPoint(funtriplet *ft, CouNumber x0, CouNumber l, CouNumber u, const OsiBranchingInformation *info=NULL) const
pick branching point based on current strategy
const CouNumber default_clamp
virtual double infeasibility(const OsiBranchingInformation *info, int &way) const
compute infeasibility of this variable, |w - f(x)| (where w is the auxiliary variable defined as w = ...
virtual OsiBranchingObject * createBranch(OsiSolverInterface *, const OsiBranchingInformation *, int) const
create CouenneBranchingObject or CouenneThreeWayBranchObj based on this object
JnlstPtr jnlst_
SmartPointer to the Journalist.
virtual bool isCuttable() const
are we on the bad or good side of the expression?
CouNumber maxHeight(funtriplet *ft, CouNumber lb, CouNumber ub)
void setParameters(Bonmin::BabSetupBase *base)
set object parameters by reading from command line
virtual double upEstimate() const
Return "up" estimate (for non-convex, distance old <–> new LP point)
bool isInteger(CouNumber x)
is this number integer?