Scippy

SCIP

Solving Constraint Integer Programs

intervalarith.h File Reference

Detailed Description

interval arithmetics for provable bounds

Author
Tobias Achterberg
Stefan Vigerske
Kati Wolter

Definition in file intervalarith.h.

#include "scip/def.h"

Go to the source code of this file.

Data Structures

struct  SCIP_Interval
 

Typedefs

typedef struct SCIP_Interval SCIP_INTERVAL
 
typedef int SCIP_ROUNDMODE
 

Functions

SCIP_EXPORT SCIP_Bool SCIPintervalHasRoundingControl (void)
 
SCIP_EXPORT void SCIPintervalSetRoundingMode (SCIP_ROUNDMODE roundmode)
 
SCIP_EXPORT SCIP_ROUNDMODE SCIPintervalGetRoundingMode (void)
 
SCIP_EXPORT void SCIPintervalSetRoundingModeDownwards (void)
 
SCIP_EXPORT void SCIPintervalSetRoundingModeUpwards (void)
 
SCIP_EXPORT void SCIPintervalSetRoundingModeToNearest (void)
 
SCIP_EXPORT void SCIPintervalSetRoundingModeTowardsZero (void)
 
SCIP_EXPORT SCIP_Real SCIPintervalNegateReal (SCIP_Real x)
 
SCIP_EXPORT SCIP_Real SCIPintervalGetInf (SCIP_INTERVAL interval)
 
SCIP_EXPORT SCIP_Real SCIPintervalGetSup (SCIP_INTERVAL interval)
 
SCIP_EXPORT void SCIPintervalSet (SCIP_INTERVAL *resultant, SCIP_Real value)
 
SCIP_EXPORT void SCIPintervalSetBounds (SCIP_INTERVAL *resultant, SCIP_Real inf, SCIP_Real sup)
 
SCIP_EXPORT void SCIPintervalSetEmpty (SCIP_INTERVAL *resultant)
 
SCIP_EXPORT SCIP_Bool SCIPintervalIsEmpty (SCIP_Real infinity, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalSetEntire (SCIP_Real infinity, SCIP_INTERVAL *resultant)
 
SCIP_EXPORT SCIP_Bool SCIPintervalIsEntire (SCIP_Real infinity, SCIP_INTERVAL operand)
 
SCIP_EXPORT SCIP_Bool SCIPintervalIsPositiveInfinity (SCIP_Real infinity, SCIP_INTERVAL operand)
 
SCIP_EXPORT SCIP_Bool SCIPintervalIsNegativeInfinity (SCIP_Real infinity, SCIP_INTERVAL operand)
 
SCIP_EXPORT SCIP_Bool SCIPintervalIsSubsetEQ (SCIP_Real infinity, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT SCIP_Bool SCIPintervalAreDisjoint (SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalIntersect (SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalUnify (SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalAddInf (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalAddSup (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalAdd (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalAddScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalAddVectors (SCIP_Real infinity, SCIP_INTERVAL *resultant, int length, SCIP_INTERVAL *operand1, SCIP_INTERVAL *operand2)
 
SCIP_EXPORT void SCIPintervalSub (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalSubScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalMulInf (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalMulSup (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalMul (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalMulScalarInf (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalMulScalarSup (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalMulScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalDiv (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalDivScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalScalprod (SCIP_Real infinity, SCIP_INTERVAL *resultant, int length, SCIP_INTERVAL *operand1, SCIP_INTERVAL *operand2)
 
SCIP_EXPORT void SCIPintervalScalprodScalarsInf (SCIP_Real infinity, SCIP_INTERVAL *resultant, int length, SCIP_INTERVAL *operand1, SCIP_Real *operand2)
 
SCIP_EXPORT void SCIPintervalScalprodScalarsSup (SCIP_Real infinity, SCIP_INTERVAL *resultant, int length, SCIP_INTERVAL *operand1, SCIP_Real *operand2)
 
SCIP_EXPORT void SCIPintervalScalprodScalars (SCIP_Real infinity, SCIP_INTERVAL *resultant, int length, SCIP_INTERVAL *operand1, SCIP_Real *operand2)
 
SCIP_EXPORT void SCIPintervalSquare (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalSquareRoot (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalPower (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalPowerScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalPowerScalarScalar (SCIP_INTERVAL *resultant, SCIP_Real operand1, SCIP_Real operand2)
 
SCIP_EXPORT SCIP_Real SCIPintervalPowerScalarIntegerInf (SCIP_Real operand1, int operand2)
 
SCIP_EXPORT SCIP_Real SCIPintervalPowerScalarIntegerSup (SCIP_Real operand1, int operand2)
 
SCIP_EXPORT void SCIPintervalPowerScalarInteger (SCIP_INTERVAL *resultant, SCIP_Real operand1, int operand2)
 
SCIP_EXPORT void SCIPintervalPowerScalarInverse (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL basedomain, SCIP_Real exponent, SCIP_INTERVAL image)
 
SCIP_EXPORT void SCIPintervalSignPowerScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_Real operand2)
 
SCIP_EXPORT void SCIPintervalReciprocal (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalExp (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalLog (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalMin (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalMax (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand1, SCIP_INTERVAL operand2)
 
SCIP_EXPORT void SCIPintervalAbs (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalSin (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalCos (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT void SCIPintervalSign (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL operand)
 
SCIP_EXPORT SCIP_Real SCIPintervalQuadUpperBound (SCIP_Real infinity, SCIP_Real a, SCIP_INTERVAL b_, SCIP_INTERVAL x)
 
SCIP_EXPORT void SCIPintervalQuad (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_Real sqrcoeff, SCIP_INTERVAL lincoeff, SCIP_INTERVAL xrng)
 
SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpressionPositive (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL sqrcoeff, SCIP_INTERVAL lincoeff, SCIP_INTERVAL rhs, SCIP_INTERVAL xbnds)
 
SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpressionNegative (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL sqrcoeff, SCIP_INTERVAL lincoeff, SCIP_INTERVAL rhs, SCIP_INTERVAL xbnds)
 
SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpressionPositiveAllScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_Real sqrcoeff, SCIP_Real lincoeff, SCIP_Real rhs, SCIP_INTERVAL xbnds)
 
SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpression (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_INTERVAL sqrcoeff, SCIP_INTERVAL lincoeff, SCIP_INTERVAL rhs, SCIP_INTERVAL xbnds)
 
SCIP_EXPORT void SCIPintervalQuadBivar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_Real ax, SCIP_Real ay, SCIP_Real axy, SCIP_Real bx, SCIP_Real by, SCIP_INTERVAL xbnds, SCIP_INTERVAL ybnds)
 
SCIP_EXPORT void SCIPintervalSolveBivariateQuadExpressionAllScalar (SCIP_Real infinity, SCIP_INTERVAL *resultant, SCIP_Real ax, SCIP_Real ay, SCIP_Real axy, SCIP_Real bx, SCIP_Real by, SCIP_INTERVAL rhs, SCIP_INTERVAL xbnds, SCIP_INTERVAL ybnds)
 

Typedef Documentation

◆ SCIP_INTERVAL

typedef struct SCIP_Interval SCIP_INTERVAL

Definition at line 42 of file intervalarith.h.

◆ SCIP_ROUNDMODE

typedef int SCIP_ROUNDMODE

rounding mode of floating point operations (upwards, downwards, nearest, ...) exact values depend on machine and compiler, so we define a corresponding enum in the header file

Definition at line 46 of file intervalarith.h.

Function Documentation

◆ SCIPintervalHasRoundingControl()

SCIP_EXPORT SCIP_Bool SCIPintervalHasRoundingControl ( void  )

returns whether rounding mode control is available

Definition at line 233 of file intervalarith.c.

References FALSE.

Referenced by SCIPfindSimpleRational().

◆ SCIPintervalSetRoundingMode()

◆ SCIPintervalGetRoundingMode()

◆ SCIPintervalSetRoundingModeDownwards()

◆ SCIPintervalSetRoundingModeUpwards()

SCIP_EXPORT void SCIPintervalSetRoundingModeUpwards ( void  )

◆ SCIPintervalSetRoundingModeToNearest()

SCIP_EXPORT void SCIPintervalSetRoundingModeToNearest ( void  )

sets rounding mode of floating point operations to nearest rounding

Definition at line 354 of file intervalarith.c.

References intervalSetRoundingMode(), and SCIP_ROUND_NEAREST.

◆ SCIPintervalSetRoundingModeTowardsZero()

SCIP_EXPORT void SCIPintervalSetRoundingModeTowardsZero ( void  )

sets rounding mode of floating point operations to towards zero rounding

Definition at line 362 of file intervalarith.c.

References intervalSetRoundingMode(), and SCIP_ROUND_ZERO.

◆ SCIPintervalNegateReal()

SCIP_EXPORT SCIP_Real SCIPintervalNegateReal ( SCIP_Real  x)

negates a number in a way that the compiler does not optimize it away

Parameters
xnumber to negate

Definition at line 370 of file intervalarith.c.

References negate().

Referenced by consdataUpdateLinearActivityLbChange(), consdataUpdateLinearActivityUbChange(), exprgraphNodePropagateBounds(), propagateBoundsCons(), and propagateConstraintSides().

◆ SCIPintervalGetInf()

◆ SCIPintervalGetSup()

◆ SCIPintervalSet()

◆ SCIPintervalSetBounds()

◆ SCIPintervalSetEmpty()

◆ SCIPintervalIsEmpty()

SCIP_EXPORT SCIP_Bool SCIPintervalIsEmpty ( SCIP_Real  infinity,
SCIP_INTERVAL  operand 
)

indicates whether interval is empty, i.e., whether inf > sup

Parameters
infinityvalue for infinity
operandoperand of operation

Definition at line 452 of file intervalarith.c.

References FALSE, SCIP_Interval::inf, and SCIP_Interval::sup.

Referenced by computeBoundsX(), computeBoundsZ(), enforceViolatedFixedNonlinear(), exprgraphNodePropagateBounds(), exprgraphNodeUpdateBounds(), propagateBounds(), propagateBoundsBilinearTerm(), propagateBoundsCons(), propagateBoundsGetQuadActivity(), propagateBoundsQuadVar(), propagateBoundsTightenVar(), reformEnsureChildrenMinCurvature(), reformMonomial(), reformulate(), replaceViolatedByLinearConstraints(), SCIP_DECL_EXPRINTEVAL(), SCIPexprgraphCheckCurvature(), SCIPexprgraphGetNodePolynomialMonomialCurvature(), SCIPexprgraphPropagateVarBounds(), SCIPexprgraphTightenNodeBounds(), SCIPexprgraphUpdateNodeBoundsCurvature(), SCIPintervalAbs(), SCIPintervalAdd(), SCIPintervalAddScalar(), SCIPintervalCos(), SCIPintervalDiv(), SCIPintervalDivScalar(), SCIPintervalExp(), SCIPintervalLog(), SCIPintervalMax(), SCIPintervalMin(), SCIPintervalMul(), SCIPintervalMulInf(), SCIPintervalMulScalar(), SCIPintervalMulScalarInf(), SCIPintervalMulScalarSup(), SCIPintervalMulSup(), SCIPintervalPower(), SCIPintervalPowerScalar(), SCIPintervalQuad(), SCIPintervalQuadUpperBound(), SCIPintervalReciprocal(), SCIPintervalSign(), SCIPintervalSignPowerScalar(), SCIPintervalSin(), SCIPintervalSolveBivariateQuadExpressionAllScalar(), SCIPintervalSolveUnivariateQuadExpression(), SCIPintervalSquare(), SCIPintervalSquareRoot(), and SCIPintervalSub().

◆ SCIPintervalSetEntire()

◆ SCIPintervalIsEntire()

SCIP_EXPORT SCIP_Bool SCIPintervalIsEntire ( SCIP_Real  infinity,
SCIP_INTERVAL  operand 
)

indicates whether interval is entire, i.e., whether inf <= -infinity and sup >= infinity

Parameters
infinityvalue for infinity
operandoperand of operation

Definition at line 476 of file intervalarith.c.

References SCIP_Interval::inf, infinity, and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), nlrowCalcActivityBounds(), propagateBoundsBilinearTerm(), propagateBoundsCons(), propagateBoundsQuadVar(), and SCIP_DECL_EXPRINTEVAL().

◆ SCIPintervalIsPositiveInfinity()

SCIP_EXPORT SCIP_Bool SCIPintervalIsPositiveInfinity ( SCIP_Real  infinity,
SCIP_INTERVAL  operand 
)

indicates whether interval is positive infinity, i.e., [infinity, infinity]

Parameters
infinityvalue for infinity
operandoperand of operation

Definition at line 485 of file intervalarith.c.

References SCIP_Interval::inf, and SCIP_Interval::sup.

Referenced by propagateBoundsTightenVar().

◆ SCIPintervalIsNegativeInfinity()

SCIP_EXPORT SCIP_Bool SCIPintervalIsNegativeInfinity ( SCIP_Real  infinity,
SCIP_INTERVAL  operand 
)

indicates whether interval is negative infinity, i.e., [-infinity, -infinity]

Parameters
infinityvalue for infinity
operandoperand of operation

Definition at line 494 of file intervalarith.c.

References SCIP_Interval::inf, and SCIP_Interval::sup.

Referenced by propagateBoundsTightenVar().

◆ SCIPintervalIsSubsetEQ()

SCIP_EXPORT SCIP_Bool SCIPintervalIsSubsetEQ ( SCIP_Real  infinity,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

indicates whether operand1 is contained in operand2

Parameters
infinityvalue for infinity
operand1first operand of operation
operand2second operand of operation

Definition at line 503 of file intervalarith.c.

References FALSE, SCIP_Interval::inf, MAX, SCIP_Interval::sup, and TRUE.

Referenced by propagateBoundsCons().

◆ SCIPintervalAreDisjoint()

SCIP_EXPORT SCIP_Bool SCIPintervalAreDisjoint ( SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

indicates whether operand1 and operand2 are disjoint

Parameters
operand1first operand of operation
operand2second operand of operation

Definition at line 522 of file intervalarith.c.

References SCIP_Interval::inf, and SCIP_Interval::sup.

Referenced by propagateBoundsCons().

◆ SCIPintervalIntersect()

SCIP_EXPORT void SCIPintervalIntersect ( SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

◆ SCIPintervalUnify()

SCIP_EXPORT void SCIPintervalUnify ( SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

interval enclosure of the union of two intervals

Parameters
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 544 of file intervalarith.c.

References SCIP_Interval::inf, MAX, NULL, and SCIP_Interval::sup.

Referenced by SCIPintervalPowerScalarInverse(), SCIPintervalSolveBivariateQuadExpressionAllScalar(), and SCIPintervalSolveUnivariateQuadExpression().

◆ SCIPintervalAddInf()

SCIP_EXPORT void SCIPintervalAddInf ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

adds operand1 and operand2 and stores infimum of result in infimum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 571 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), NULL, and SCIP_ROUND_DOWNWARDS.

Referenced by SCIPintervalAdd(), SCIPintervalAddVectors(), SCIPintervalScalprod(), and SCIPintervalScalprodScalarsInf().

◆ SCIPintervalAddSup()

SCIP_EXPORT void SCIPintervalAddSup ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

adds operand1 and operand2 and stores supremum of result in supremum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 598 of file intervalarith.c.

References infinity, intervalGetRoundingMode(), NULL, SCIP_ROUND_UPWARDS, and SCIP_Interval::sup.

Referenced by SCIPintervalAdd(), SCIPintervalAddVectors(), SCIPintervalScalprod(), and SCIPintervalScalprodScalarsSup().

◆ SCIPintervalAdd()

SCIP_EXPORT void SCIPintervalAdd ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

◆ SCIPintervalAddScalar()

SCIP_EXPORT void SCIPintervalAddScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

adds operand1 and scalar operand2 and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 652 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), NULL, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), propagateBounds(), propagateBoundsQuadVar(), SCIP_DECL_EXPRINTEVAL(), SCIPintervalQuadBivar(), SCIPintervalSolveBivariateQuadExpressionAllScalar(), and SCIPintervalSubScalar().

◆ SCIPintervalAddVectors()

SCIP_EXPORT void SCIPintervalAddVectors ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
int  length,
SCIP_INTERVAL operand1,
SCIP_INTERVAL operand2 
)

adds vector operand1 and vector operand2 and stores result in vector resultant

Parameters
infinityvalue for infinity
resultantarray of resultant intervals of operation
lengthlength of arrays
operand1array of first operands of operation
operand2array of second operands of operation

Definition at line 702 of file intervalarith.c.

References intervalGetRoundingMode(), intervalSetRoundingMode(), SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalAddInf(), and SCIPintervalAddSup().

◆ SCIPintervalSub()

SCIP_EXPORT void SCIPintervalSub ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

subtracts operand2 from operand1 and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 732 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), NULL, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), lpUpdateVarColumnProved(), lpUpdateVarProved(), operator-(), propagateBounds(), propagateBoundsCons(), propagateBoundsQuadVar(), provedBound(), SCIP_DECL_EXPRINTEVAL(), SCIPintervalSolveBivariateQuadExpressionAllScalar(), and SCIPlpGetModifiedProvedPseudoObjval().

◆ SCIPintervalSubScalar()

SCIP_EXPORT void SCIPintervalSubScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

subtracts scalar operand2 from operand1 and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 780 of file intervalarith.c.

References SCIPintervalAddScalar().

Referenced by exprgraphNodePropagateBounds(), and propagateBounds().

◆ SCIPintervalMulInf()

SCIP_EXPORT void SCIPintervalMulInf ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

multiplies operand1 with operand2 and stores infimum of result in infimum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation; can be +/-inf
operand2second operand of operation; can be +/-inf

Definition at line 791 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), NULL, SCIP_Real, SCIP_ROUND_DOWNWARDS, SCIPintervalIsEmpty(), SCIPintervalMulScalarInf(), and SCIP_Interval::sup.

Referenced by propagateBoundsCons(), SCIPintervalMul(), and SCIPintervalScalprod().

◆ SCIPintervalMulSup()

SCIP_EXPORT void SCIPintervalMulSup ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

multiplies operand1 with operand2 and stores supremum of result in supremum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation; can be +/-inf
operand2second operand of operation; can be +/-inf

Definition at line 851 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), MAX, NULL, SCIP_Real, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), SCIPintervalMulScalarSup(), and SCIP_Interval::sup.

Referenced by propagateBoundsCons(), SCIPintervalMul(), and SCIPintervalScalprod().

◆ SCIPintervalMul()

SCIP_EXPORT void SCIPintervalMul ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

multiplies operand1 with operand2 and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation; can be +/-inf
operand2second operand of operation; can be +/-inf

Definition at line 911 of file intervalarith.c.

References intervalGetRoundingMode(), intervalSetRoundingMode(), NULL, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), SCIPintervalMulInf(), and SCIPintervalMulSup().

Referenced by exprgraphNodePropagateBounds(), lpUpdateVarColumnProved(), lpUpdateVarLooseProved(), lpUpdateVarProved(), operator*(), provedBound(), SCIP_DECL_EXPRINTEVAL(), SCIPintervalDiv(), SCIPintervalPower(), SCIPintervalQuad(), and SCIPlpGetModifiedProvedPseudoObjval().

◆ SCIPintervalMulScalarInf()

SCIP_EXPORT void SCIPintervalMulScalarInf ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

multiplies operand1 with scalar operand2 and stores infimum of result in infimum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation; can be +/- inf

Definition at line 938 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), NULL, SCIP_ROUND_DOWNWARDS, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by SCIPintervalMulInf(), SCIPintervalMulScalar(), and SCIPintervalScalprodScalarsInf().

◆ SCIPintervalMulScalarSup()

SCIP_EXPORT void SCIPintervalMulScalarSup ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

multiplies operand1 with scalar operand2 and stores supremum of result in supremum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation; can be +/- inf

Definition at line 994 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), NULL, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by SCIPintervalMulScalar(), SCIPintervalMulSup(), and SCIPintervalScalprodScalarsSup().

◆ SCIPintervalMulScalar()

SCIP_EXPORT void SCIPintervalMulScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

◆ SCIPintervalDiv()

SCIP_EXPORT void SCIPintervalDiv ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

divides operand1 by operand2 and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 1089 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), NULL, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), SCIPintervalMul(), SCIPintervalSet(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), operator/(), SCIP_DECL_EXPRINTEVAL(), and SCIPintervalSolveUnivariateQuadExpression().

◆ SCIPintervalDivScalar()

SCIP_EXPORT void SCIPintervalDivScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

divides operand1 by scalar operand2 and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 1143 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), NULL, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by presolveTryAddLinearReform(), propagateBounds(), and propagateBoundsCons().

◆ SCIPintervalScalprod()

SCIP_EXPORT void SCIPintervalScalprod ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
int  length,
SCIP_INTERVAL operand1,
SCIP_INTERVAL operand2 
)

computes the scalar product of two vectors of intervals and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
lengthlength of vectors
operand1first vector as array of intervals; can have +/-inf entries
operand2second vector as array of intervals; can have +/-inf entries

Definition at line 1246 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalAddInf(), SCIPintervalAddSup(), SCIPintervalMulInf(), SCIPintervalMulSup(), SCIPintervalSetEntire(), and SCIP_Interval::sup.

◆ SCIPintervalScalprodScalarsInf()

SCIP_EXPORT void SCIPintervalScalprodScalarsInf ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
int  length,
SCIP_INTERVAL operand1,
SCIP_Real operand2 
)

computes the scalar product of a vector of intervals and a vector of scalars and stores infimum of result in infimum of resultant

computes scalar product of a vector of intervals and a vector of scalars and stores infimum of result in infimum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
lengthlength of vectors
operand1first vector as array of intervals
operand2second vector as array of scalars; can have +/-inf entries

Definition at line 1288 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), SCIP_ROUND_DOWNWARDS, SCIPintervalAddInf(), SCIPintervalMulScalarInf(), SCIPintervalSetEntire(), and SCIP_Interval::sup.

Referenced by SCIPintervalScalprodScalars().

◆ SCIPintervalScalprodScalarsSup()

SCIP_EXPORT void SCIPintervalScalprodScalarsSup ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
int  length,
SCIP_INTERVAL operand1,
SCIP_Real operand2 
)

computes the scalar product of a vector of intervals and a vector of scalars and stores supremum of result in supremum of resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
lengthlength of vectors
operand1first vector as array of intervals
operand2second vector as array of scalars; can have +/-inf entries

Definition at line 1316 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), SCIP_ROUND_UPWARDS, SCIPintervalAddSup(), SCIPintervalMulScalarSup(), SCIPintervalSetEntire(), and SCIP_Interval::sup.

Referenced by SCIPintervalScalprodScalars().

◆ SCIPintervalScalprodScalars()

SCIP_EXPORT void SCIPintervalScalprodScalars ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
int  length,
SCIP_INTERVAL operand1,
SCIP_Real operand2 
)

computes the scalar product of a vector of intervals and a vector of scalars and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
lengthlength of vectors
operand1first vector as array of intervals
operand2second vector as array of scalars; can have +/-inf entries

Definition at line 1342 of file intervalarith.c.

References SCIP_Interval::inf, intervalGetRoundingMode(), intervalSetRoundingMode(), SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalScalprodScalarsInf(), SCIPintervalScalprodScalarsSup(), and SCIP_Interval::sup.

Referenced by SCIP_DECL_EXPRINTEVAL().

◆ SCIPintervalSquare()

SCIP_EXPORT void SCIPintervalSquare ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

squares operand and stores result in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 1370 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), MAX, NULL, SCIP_Real, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), SCIP_Interval::sup, x, and y.

Referenced by exprgraphNodePropagateBounds(), propagateBounds(), SCIP_DECL_EXPRINTEVAL(), and square().

◆ SCIPintervalSquareRoot()

SCIP_EXPORT void SCIPintervalSquareRoot ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

stores (positive part of) square root of operand in resultant

Attention
we assume a correctly rounded sqrt(double) function when rounding is to nearest
Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 1442 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), NULL, SCIP_Real, SCIP_REAL_MAX, SCIP_REAL_MIN, SCIP_ROUND_NEAREST, SCIPintervalIsEmpty(), SCIPintervalSetEmpty(), SCIPnextafter(), sqrt(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), propagateBounds(), SCIP_DECL_EXPRINTEVAL(), and sqrt().

◆ SCIPintervalPower()

SCIP_EXPORT void SCIPintervalPower ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

stores operand1 to the power of operand2 in resultant

uses SCIPintervalPowerScalar if operand2 is a scalar, otherwise computes exp(op2*log(op1))

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 1503 of file intervalarith.c.

References SCIP_Interval::inf, NULL, SCIPintervalExp(), SCIPintervalIsEmpty(), SCIPintervalLog(), SCIPintervalMul(), SCIPintervalPowerScalar(), SCIPintervalSet(), SCIPintervalSetBounds(), and SCIP_Interval::sup.

Referenced by pow(), and SCIPintervalPowerScalarInverse().

◆ SCIPintervalPowerScalar()

SCIP_EXPORT void SCIPintervalPowerScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

stores operand1 to the power of the scalar operand2 in resultant

stores operand1 to the power of the scalar operand2 in resultant

Attention
we assume a correctly rounded pow(double) function when rounding is to nearest
Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 1838 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), MAX, NULL, pow(), SCIP_Bool, SCIP_REAL_MAX, SCIP_REAL_MIN, SCIP_ROUND_NEAREST, SCIPintervalIsEmpty(), SCIPintervalPowerScalarIntegerInf(), SCIPintervalPowerScalarIntegerSup(), SCIPintervalSetEmpty(), SCIPnextafter(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), pow(), SCIP_DECL_EXPRINTEVAL(), and SCIPintervalPower().

◆ SCIPintervalPowerScalarScalar()

SCIP_EXPORT void SCIPintervalPowerScalarScalar ( SCIP_INTERVAL resultant,
SCIP_Real  operand1,
SCIP_Real  operand2 
)

stores bounds on the power of a scalar operand1 to a scalar operand2 in resultant both operands need to be finite numbers need to have operand1 >= 0 or operand2 integer and need to have operand2 >= 0 if operand1 == 0

Attention
we assume a correctly rounded pow(double) function when rounding is to nearest
Parameters
resultantresultant of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 1795 of file intervalarith.c.

References SCIP_Interval::inf, intervalGetRoundingMode(), NULL, pow(), SCIP_Real, SCIP_REAL_MAX, SCIP_REAL_MIN, SCIP_ROUND_NEAREST, SCIPintervalSet(), SCIPnextafter(), and SCIP_Interval::sup.

◆ SCIPintervalPowerScalarIntegerInf()

SCIP_EXPORT SCIP_Real SCIPintervalPowerScalarIntegerInf ( SCIP_Real  operand1,
int  operand2 
)

computes lower bound on power of a scalar operand1 to an integer operand2 both operands need to be finite numbers need to have operand1 >= 0 and need to have operand2 >= 0 if operand1 == 0

Parameters
operand1first operand of operation
operand2second operand of operation

Definition at line 1548 of file intervalarith.c.

References intervalGetRoundingMode(), intervalSetRoundingMode(), SCIP_Real, SCIP_ROUND_DOWNWARDS, SCIPintervalPowerScalarIntegerSup(), and TRUE.

Referenced by SCIPintervalPowerScalar(), and SCIPintervalPowerScalarIntegerSup().

◆ SCIPintervalPowerScalarIntegerSup()

SCIP_EXPORT SCIP_Real SCIPintervalPowerScalarIntegerSup ( SCIP_Real  operand1,
int  operand2 
)

computes upper bound on power of a scalar operand1 to an integer operand2 both operands need to be finite numbers need to have operand1 >= 0 and need to have operand2 >= 0 if operand1 == 0

Parameters
operand1first operand of operation
operand2second operand of operation

Definition at line 1630 of file intervalarith.c.

References intervalGetRoundingMode(), intervalSetRoundingMode(), SCIP_Real, SCIP_ROUND_UPWARDS, SCIPintervalPowerScalarIntegerInf(), and TRUE.

Referenced by SCIPintervalPowerScalar(), and SCIPintervalPowerScalarIntegerInf().

◆ SCIPintervalPowerScalarInteger()

SCIP_EXPORT void SCIPintervalPowerScalarInteger ( SCIP_INTERVAL resultant,
SCIP_Real  operand1,
int  operand2 
)

computes bounds on power of a scalar operand1 to an integer operand2 both operands need to be finite numbers need to have operand1 >= 0 and need to have operand2 >= 0 if operand1 == 0

Parameters
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 1704 of file intervalarith.c.

References SCIP_Interval::inf, intervalGetRoundingMode(), intervalSetRoundingMode(), negate(), SCIP_Real, SCIP_REAL_MAX, SCIP_ROUND_UPWARDS, SCIPintervalPowerScalarInteger(), SCIPintervalReciprocal(), SCIPintervalSet(), SCIP_Interval::sup, and TRUE.

Referenced by SCIPintervalPowerScalarInteger().

◆ SCIPintervalPowerScalarInverse()

SCIP_EXPORT void SCIPintervalPowerScalarInverse ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  basedomain,
SCIP_Real  exponent,
SCIP_INTERVAL  image 
)

given an interval for the image of a power operation, computes an interval for the origin that is, for y = x^p with p = exponent a given scalar and y = image a given interval, computes a subinterval x of basedomain such that y in x^p and such that for all z in basedomain less x, z^p not in y

Parameters
infinityvalue for infinity
resultantresultant interval of operation
basedomaindomain of base
exponentexponent
imageinterval image of power

Definition at line 2086 of file intervalarith.c.

References EPSISINT, SCIP_Interval::inf, MAX, NULL, SCIPintervalIntersect(), SCIPintervalPower(), SCIPintervalReciprocal(), SCIPintervalSetBounds(), SCIPintervalSetEmpty(), SCIPintervalUnify(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds().

◆ SCIPintervalSignPowerScalar()

SCIP_EXPORT void SCIPintervalSignPowerScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_Real  operand2 
)

stores operand1 to the signed power of the scalar positive operand2 in resultant

the signed power of x w.r.t. an exponent n >= 0 is given as sign(x) * abs(x)^n

Attention
we assume correctly rounded sqrt(double) and pow(double) functions when rounding is to nearest
Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 2167 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), negate(), NULL, pow(), SCIP_REAL_MAX, SCIP_REAL_MIN, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_NEAREST, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), SCIPnextafter(), sqrt(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), SCIP_DECL_EXPRINTEVAL(), and signpow().

◆ SCIPintervalReciprocal()

SCIP_EXPORT void SCIPintervalReciprocal ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

computes the reciprocal of an interval

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 2339 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), NULL, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by SCIPintervalPowerScalarInteger(), and SCIPintervalPowerScalarInverse().

◆ SCIPintervalExp()

SCIP_EXPORT void SCIPintervalExp ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

stores exponential of operand in resultant

Attention
we assume a correctly rounded exp(double) function when rounding is to nearest
Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 2412 of file intervalarith.c.

References exp(), SCIP_Interval::inf, infinity, intervalGetRoundingMode(), NULL, SCIP_Real, SCIP_REAL_MAX, SCIP_REAL_MIN, SCIP_ROUND_NEAREST, SCIPintervalIsEmpty(), SCIPnextafter(), and SCIP_Interval::sup.

Referenced by exp(), exprgraphNodePropagateBounds(), SCIP_DECL_EXPRINTEVAL(), and SCIPintervalPower().

◆ SCIPintervalLog()

SCIP_EXPORT void SCIPintervalLog ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

stores natural logarithm of operand in resultant

Attention
we assume a correctly rounded log(double) function when rounding is to nearest
Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 2496 of file intervalarith.c.

References SCIP_Interval::inf, infinity, intervalGetRoundingMode(), log(), NULL, SCIP_Real, SCIP_REAL_MAX, SCIP_REAL_MIN, SCIP_ROUND_NEAREST, SCIPintervalIsEmpty(), SCIPintervalSetEmpty(), SCIPnextafter(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), log(), SCIP_DECL_EXPRINTEVAL(), and SCIPintervalPower().

◆ SCIPintervalMin()

SCIP_EXPORT void SCIPintervalMin ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

stores minimum of operands in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 2564 of file intervalarith.c.

References SCIP_Interval::inf, NULL, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by SCIP_DECL_EXPRINTEVAL().

◆ SCIPintervalMax()

SCIP_EXPORT void SCIPintervalMax ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand1,
SCIP_INTERVAL  operand2 
)

stores maximum of operands in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operand1first operand of operation
operand2second operand of operation

Definition at line 2580 of file intervalarith.c.

References SCIP_Interval::inf, MAX, NULL, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by SCIP_DECL_EXPRINTEVAL().

◆ SCIPintervalAbs()

SCIP_EXPORT void SCIPintervalAbs ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

stores absolute value of operand in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 2596 of file intervalarith.c.

References SCIP_Interval::inf, MAX, NULL, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by abs(), fabs(), and SCIP_DECL_EXPRINTEVAL().

◆ SCIPintervalSin()

SCIP_EXPORT void SCIPintervalSin ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

stores sine value of operand in resultant NOTE: the operations are not applied rounding-safe here

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 2624 of file intervalarith.c.

References a, b, SCIP_Interval::inf, M_PI, MAX, NULL, REALABS, SCIP_Real, SCIPintervalIsEmpty(), SCIPintervalSetBounds(), sin(), sin_extremepoints, and SCIP_Interval::sup.

Referenced by SCIP_DECL_EXPRINTEVAL(), and sin().

◆ SCIPintervalCos()

SCIP_EXPORT void SCIPintervalCos ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

stores cosine value of operand in resultant NOTE: the operations are not applied rounding-safe here

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 2708 of file intervalarith.c.

References a, b, cos(), cos_extremepoints, SCIP_Interval::inf, M_PI, MAX, NULL, REALABS, SCIP_Real, SCIPintervalIsEmpty(), SCIPintervalSetBounds(), and SCIP_Interval::sup.

Referenced by cos(), and SCIP_DECL_EXPRINTEVAL().

◆ SCIPintervalSign()

SCIP_EXPORT void SCIPintervalSign ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  operand 
)

stores sign of operand in resultant

Parameters
infinityvalue for infinity
resultantresultant interval of operation
operandoperand of operation

Definition at line 2790 of file intervalarith.c.

References SCIP_Interval::inf, NULL, SCIPintervalIsEmpty(), and SCIP_Interval::sup.

Referenced by SCIP_DECL_EXPRINTEVAL(), and sign().

◆ SCIPintervalQuadUpperBound()

SCIP_EXPORT SCIP_Real SCIPintervalQuadUpperBound ( SCIP_Real  infinity,
SCIP_Real  a,
SCIP_INTERVAL  b_,
SCIP_INTERVAL  x 
)

computes exact upper bound on \( a x^2 + b x \) for x in [xlb, xub], b an interval, and a scalar

Uses Algorithm 2.2 from Domes and Neumaier: Constraint propagation on quadratic constraints (2008)

Parameters
infinityvalue for infinity
acoefficient of x^2
b_coefficient of x
xrange of x

Definition at line 2819 of file intervalarith.c.

References b, SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), MAX, negate(), SCIP_Real, SCIP_ROUND_UPWARDS, SCIPintervalIsEmpty(), SCIPintervalQuadUpperBound(), SCIP_Interval::sup, and x.

Referenced by propagateBoundsGetQuadActivity(), propagateBoundsQuadVar(), SCIPintervalQuad(), SCIPintervalQuadUpperBound(), and SCIPintervalSolveBivariateQuadExpressionAllScalar().

◆ SCIPintervalQuad()

SCIP_EXPORT void SCIPintervalQuad ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_Real  sqrcoeff,
SCIP_INTERVAL  lincoeff,
SCIP_INTERVAL  xrng 
)

stores range of quadratic term in resultant

given scalar a and intervals b and x, computes interval for \( a x^2 + b x \)

Parameters
infinityvalue for infinity
resultantresultant interval of operation
sqrcoeffcoefficient of x^2
lincoeffcoefficient of x
xrngrange of x

Definition at line 2914 of file intervalarith.c.

References SCIP_Interval::inf, SCIP_Real, SCIPintervalIsEmpty(), SCIPintervalMul(), SCIPintervalQuadUpperBound(), SCIPintervalSetEmpty(), and SCIP_Interval::sup.

Referenced by nlrowCalcActivityBounds(), propagateBoundsQuadVar(), SCIP_DECL_EXPRINTEVAL(), SCIPintervalQuadBivar(), and SCIPintervalSolveBivariateQuadExpressionAllScalar().

◆ SCIPintervalSolveUnivariateQuadExpressionPositive()

SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpressionPositive ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  sqrcoeff,
SCIP_INTERVAL  lincoeff,
SCIP_INTERVAL  rhs,
SCIP_INTERVAL  xbnds 
)

computes interval with positive solutions of a quadratic equation with interval coefficients

Given intervals a, b, and c, this function computes an interval that contains all positive solutions of \( a x^2 + b x \in c\) within xbnds.

Parameters
infinityvalue for infinity
resultantresultant interval of operation
sqrcoeffcoefficient of x^2
lincoeffcoefficient of x
rhsright hand side of equation
xbndsbounds on x

Definition at line 2949 of file intervalarith.c.

References SCIP_Interval::inf, infinity, NULL, SCIPdebugMessage, SCIPdebugPrintf, SCIPintervalIntersect(), SCIPintervalSetEmpty(), SCIPintervalSolveUnivariateQuadExpressionPositiveAllScalar(), and SCIP_Interval::sup.

Referenced by SCIPintervalSolveBivariateQuadExpressionAllScalar(), SCIPintervalSolveUnivariateQuadExpression(), and SCIPintervalSolveUnivariateQuadExpressionNegative().

◆ SCIPintervalSolveUnivariateQuadExpressionNegative()

SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpressionNegative ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  sqrcoeff,
SCIP_INTERVAL  lincoeff,
SCIP_INTERVAL  rhs,
SCIP_INTERVAL  xbnds 
)

computes interval with negative solutions of a quadratic equation with interval coefficients

Given intervals a, b, and c, this function computes an interval that contains all negative solutions of \( a x^2 + b x \in c\) within xbnds.

Parameters
infinityvalue for infinity
resultantresultant interval of operation
sqrcoeffcoefficient of x^2
lincoeffcoefficient of x
rhsright hand side of equation
xbndsbounds on x

Definition at line 2996 of file intervalarith.c.

References SCIP_Interval::inf, SCIP_Real, SCIPintervalSolveUnivariateQuadExpressionPositive(), and SCIP_Interval::sup.

Referenced by SCIPintervalSolveBivariateQuadExpressionAllScalar(), and SCIPintervalSolveUnivariateQuadExpression().

◆ SCIPintervalSolveUnivariateQuadExpressionPositiveAllScalar()

SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpressionPositiveAllScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_Real  sqrcoeff,
SCIP_Real  lincoeff,
SCIP_Real  rhs,
SCIP_INTERVAL  xbnds 
)

computes positive solutions of a quadratic equation with scalar coefficients

Given scalar a, b, and c, this function computes an interval that contains all positive solutions of \( a x^2 + b x \geq c\) within xbnds. Implements Algorithm 3.2 from Domes and Neumaier: Constraint propagation on quadratic constraints (2008).

Parameters
infinityvalue for infinity
resultantresultant interval of operation
sqrcoeffcoefficient of x^2
lincoeffcoefficient of x
rhsright hand side of equation
xbndsbounds on x

Definition at line 3032 of file intervalarith.c.

References b, SCIP_Interval::inf, infinity, intervalGetRoundingMode(), intervalSetRoundingMode(), MAX, negate(), NULL, SCIP_Real, SCIP_REAL_MAX, SCIP_REAL_MIN, SCIP_ROUND_DOWNWARDS, SCIP_ROUND_NEAREST, SCIP_ROUND_UPWARDS, SCIPintervalIntersect(), SCIPintervalSetEmpty(), SCIPnextafter(), sqrt(), and SCIP_Interval::sup.

Referenced by SCIPintervalSolveUnivariateQuadExpressionPositive().

◆ SCIPintervalSolveUnivariateQuadExpression()

SCIP_EXPORT void SCIPintervalSolveUnivariateQuadExpression ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_INTERVAL  sqrcoeff,
SCIP_INTERVAL  lincoeff,
SCIP_INTERVAL  rhs,
SCIP_INTERVAL  xbnds 
)

solves a quadratic equation with interval coefficients

Given intervals a, b and c, this function computes an interval that contains all solutions of \( a x^2 + b x \in c\) within xbnds

Parameters
infinityvalue for infinity
resultantresultant interval of operation
sqrcoeffcoefficient of x^2
lincoeffcoefficient of x
rhsright hand side of equation
xbndsbounds on x

Definition at line 3236 of file intervalarith.c.

References SCIP_Interval::inf, MAX, NULL, SCIPdebugMessage, SCIPintervalDiv(), SCIPintervalGetInf(), SCIPintervalGetSup(), SCIPintervalIntersect(), SCIPintervalIsEmpty(), SCIPintervalSetEmpty(), SCIPintervalSolveUnivariateQuadExpressionNegative(), SCIPintervalSolveUnivariateQuadExpressionPositive(), SCIPintervalUnify(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), propagateBoundsQuadVar(), and SCIPintervalSolveBivariateQuadExpressionAllScalar().

◆ SCIPintervalQuadBivar()

SCIP_EXPORT void SCIPintervalQuadBivar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_Real  ax,
SCIP_Real  ay,
SCIP_Real  axy,
SCIP_Real  bx,
SCIP_Real  by,
SCIP_INTERVAL  xbnds,
SCIP_INTERVAL  ybnds 
)

stores range of bivariate quadratic term in resultant given scalars ax, ay, axy, bx, and by and intervals for x and y, computes interval for \( ax x^2 + ay y^2 + axy x y + bx x + by y \) NOTE: the operations are not applied rounding-safe here

Parameters
infinityvalue for infinity in interval arithmetics
resultantbuffer where to store result of operation
axsquare coefficient of x
aysquare coefficient of y
axybilinear coefficients
bxlinear coefficient of x
bylinear coefficient of y
xbndsbounds on x
ybndsbounds on y

Definition at line 3299 of file intervalarith.c.

References SCIP_Interval::inf, infinity, MAX, NULL, REALABS, SCIP_Real, SCIPdebugMessage, SCIPintervalAdd(), SCIPintervalAddScalar(), SCIPintervalQuad(), SCIPintervalSet(), SCIPintervalSetBounds(), SCIP_Interval::sup, x, and y.

Referenced by SCIP_DECL_EXPRINTEVAL().

◆ SCIPintervalSolveBivariateQuadExpressionAllScalar()

SCIP_EXPORT void SCIPintervalSolveBivariateQuadExpressionAllScalar ( SCIP_Real  infinity,
SCIP_INTERVAL resultant,
SCIP_Real  ax,
SCIP_Real  ay,
SCIP_Real  axy,
SCIP_Real  bx,
SCIP_Real  by,
SCIP_INTERVAL  rhs,
SCIP_INTERVAL  xbnds,
SCIP_INTERVAL  ybnds 
)

solves a bivariate quadratic equation for the first variable given scalars ax, ay, axy, bx and by, and intervals for x, y, and rhs, computes \( \{ x \in \mathbf{x} : \exists y \in \mathbf{y} : a_x x^2 + a_y y^2 + a_{xy} x y + b_x x + b_y y \in \mathbf{\mbox{rhs}} \} \) NOTE: the operations are not applied rounding-safe here

Parameters
infinityvalue for infinity in interval arithmetics
resultantbuffer where to store result of operation
axsquare coefficient of x
aysquare coefficient of y
axybilinear coefficients
bxlinear coefficient of x
bylinear coefficient of y
rhsright-hand-side of equation
xbndsbounds on x
ybndsbounds on y

Definition at line 3558 of file intervalarith.c.

References b, CALCB, CALCR, EPSGE, EPSGT, EPSLE, EPSLT, EPSN, EPSZ, SCIP_Interval::inf, infinity, MAX, NULL, REALABS, SCIP_Real, SCIPintervalAddScalar(), SCIPintervalIntersect(), SCIPintervalIsEmpty(), SCIPintervalMulScalar(), SCIPintervalQuad(), SCIPintervalQuadUpperBound(), SCIPintervalSet(), SCIPintervalSetBounds(), SCIPintervalSetEmpty(), SCIPintervalSolveBivariateQuadExpressionAllScalar(), SCIPintervalSolveUnivariateQuadExpression(), SCIPintervalSolveUnivariateQuadExpressionNegative(), SCIPintervalSolveUnivariateQuadExpressionPositive(), SCIPintervalSub(), SCIPintervalUnify(), sqrt(), and SCIP_Interval::sup.

Referenced by exprgraphNodePropagateBounds(), propagateBoundsBilinearTerm(), and SCIPintervalSolveBivariateQuadExpressionAllScalar().