class logarithm, $\log f(x)$ More...

#include <CouenneExprLog.hpp>

Inheritance diagram for Couenne::exprLog:

Public Member Functions
	exprLog (expression *al)
	Constructors, destructor. More...

expression *	clone (Domain *d=NULL) const
	cloning method More...

unary_function	F ()
	the operator's function More...

std::string	printOp () const
	print operator More...

CouNumber	gradientNorm (const double *x)
	return l-2 norm of gradient at given point More...

expression *	differentiate (int index)
	differentiation More...

void	getBounds (expression &, expression &)
	Get lower and upper bound of an expression (if any) More...

void	getBounds (CouNumber &lb, CouNumber &ub)
	Get value of lower and upper bound of an expression (if any) More...

void	generateCuts (expression w, OsiCuts &cs, const CouenneCutGenerator cg, t_chg_bounds *=NULL, int=-1, CouNumber=-COUENNE_INFINITY, CouNumber=COUENNE_INFINITY)
	generate equality between this and w More...

virtual enum expr_type	code ()
	code for comparisons More...

bool	impliedBound (int, CouNumber , CouNumber , t_chg_bounds *, enum auxSign=expression::AUX_EQ)
	implied bound processing More...

virtual CouNumber	selectBranch (const CouenneObject obj, const OsiBranchingInformation info, expression &var, double &brpts, double *&brDist, int &way)
	set up branching object by evaluating many branching points for each expression's arguments More...

virtual bool	isBijective () const
	return true if feasible More...

virtual CouNumber	inverse (expression *vardep) const
	inverse of this operator More...

virtual bool	isCuttable (CouenneProblem *problem, int index) const
	can this expression be further linearized or are we on its concave ("bad") side More...

Public Member Functions inherited from Couenne::exprUnary
virtual enum nodeType	Type () const
	node type More...

	exprUnary (expression *argument)
	Constructor. More...

virtual	~exprUnary ()
	Destructor. More...

int	nArgs () const
	return number of arguments More...

virtual expression *	Argument () const
	return argument More...

virtual expression **	ArgPtr ()
	return pointer to argument More...

virtual void	print (std::ostream &out=std::cout, bool=false) const
	print this expression to iostream More...

virtual enum pos	printPos () const
	print position (PRE, INSIDE, POST) More...

virtual CouNumber	operator() ()
	compute value of unary operator More...

virtual int	DepList (std::set< int > &deplist, enum dig_type type=ORIG_ONLY)
	fill in the set with all indices of variables appearing in the expression More...

expression *	simplify ()
	simplification More...

virtual int	Linearity ()
	get a measure of "how linear" the expression is (see CouenneTypes.h) for general univariate functions, return nonlinear. More...

virtual exprAux *	standardize (CouenneProblem *, bool addAux=true)
	reduce expression in standard form, creating additional aux variables (and constraints) More...

virtual bool	isInteger ()
	is this expression integer? More...

virtual int	compare (exprUnary &)
	compare two unary functions More...

virtual int	rank ()
	used in rank-based branching variable choice More...

virtual void	fillDepSet (std::set< DepNode , compNode > dep, DepGraph *g)
	fill in dependence structure More...

virtual void	replace (exprVar , exprVar )
	replace variable with other More...

virtual void	realign (const CouenneProblem *p)
	empty function to redirect variables to proper variable vector More...

Public Member Functions inherited from Couenne::expression
	expression ()
	Constructor. More...

	expression (const expression &e, Domain *d=NULL)
	Copy constructor. More...

virtual	~expression ()
	Destructor. More...

virtual int	Index () const
	Return index of variable (only valid for exprVar and exprAux) More...

virtual expression **	ArgList () const
	return arglist (when applicable, that is, with N-ary functions) More...

virtual void	ArgList (expression **al)
	set arglist (used in deleting nodes without deleting children) More...

virtual expression *	Image () const
	return pointer to corresponding expression (for auxiliary variables only) More...

virtual void	Image (expression *image)
	set expression associated with this auxiliary variable (for compatibility with exprAux) More...

virtual CouNumber	Value () const
	value (empty) More...

virtual const expression *	Original () const
	If this is an exprClone of a exprClone of an expr???, point to the original expr??? instead of an exprClone – improve computing efficiency. More...

virtual int	dependsOn (int *ind, int n, enum dig_type type=STOP_AT_AUX)
	dependence on variable set: return cardinality of subset of the set of indices in first argument which occur in expression. More...

int	dependsOn (int singleton, enum dig_type type=STOP_AT_AUX)
	version with one index only More...

virtual bool	isDefinedInteger ()
	is this expression defined as an integer? More...

virtual enum convexity	convexity () const
	either CONVEX, CONCAVE, AFFINE, or NONCONVEX More...

virtual int	compare (expression &)
	compare expressions More...

virtual int	compare (exprCopy &)
	compare copies of expressions More...

virtual int	Multiplicity ()
	multiplicity of a variable More...

virtual void	linkDomain (Domain *d)
	empty function to update domain pointer More...

virtual void	closestFeasible (expression varind, expression vardep, CouNumber &left, CouNumber &right) const
	closest feasible points in function in both directions More...

virtual bool	isaCopy () const
	return true if this is a copy of something (i.e. an exprCopy) More...

virtual expression *	Copy () const
	return copy of this expression (only makes sense in exprCopy) More...

Additional Inherited Members
Public Types inherited from Couenne::expression
enum	auxSign { AUX_UNDEF =-2, AUX_LEQ =-1, AUX_EQ, AUX_GEQ }
	"sign" of the constraint defining an auxiliary. More...

Protected Attributes inherited from Couenne::exprUnary
expression *	argument_
	single argument taken by this expression More...

Detailed Description

class logarithm, $\log f(x)$

Definition at line 21 of file CouenneExprLog.hpp.

Constructor & Destructor Documentation

Couenne::exprLog::exprLog ( expression * al )

inline

Constructors, destructor.

Definition at line 26 of file CouenneExprLog.hpp.

Referenced by clone().

Member Function Documentation

expression* Couenne::exprLog::clone ( Domain * d = NULL ) const

inlinevirtual

cloning method

Reimplemented from Couenne::expression.

Definition at line 30 of file CouenneExprLog.hpp.

References Couenne::exprUnary::argument_, and exprLog().

unary_function Couenne::exprLog::F ( )

inlinevirtual

the operator's function

Reimplemented from Couenne::exprUnary.

Definition at line 34 of file CouenneExprLog.hpp.

References Couenne::log().

std::string Couenne::exprLog::printOp ( ) const

inlinevirtual

print operator

Reimplemented from Couenne::exprUnary.

Definition at line 37 of file CouenneExprLog.hpp.

CouNumber Couenne::exprLog::gradientNorm ( const double * x )

virtual

return l-2 norm of gradient at given point

Reimplemented from Couenne::expression.

expression* Couenne::exprLog::differentiate ( int index )

virtual

differentiation

Reimplemented from Couenne::expression.

void Couenne::exprLog::getBounds	(	expression *&	,
		expression *&
	)

virtual

Get lower and upper bound of an expression (if any)

Reimplemented from Couenne::expression.

void Couenne::exprLog::getBounds	(	CouNumber &	lb,
		CouNumber &	ub
	)

virtual

Get value of lower and upper bound of an expression (if any)

Reimplemented from Couenne::expression.

void Couenne::exprLog::generateCuts	(	expression *	w,
		OsiCuts &	cs,
		const CouenneCutGenerator *	cg,
		t_chg_bounds *	= `NULL`,
		int	= `-1`,
		CouNumber	= `-COUENNE_INFINITY`,
		CouNumber	= `COUENNE_INFINITY`
	)

virtual

generate equality between *this and *w

Reimplemented from Couenne::expression.

virtual enum expr_type Couenne::exprLog::code ( )

inlinevirtual

code for comparisons

Reimplemented from Couenne::exprUnary.

Definition at line 60 of file CouenneExprLog.hpp.

References Couenne::COU_EXPRLOG.

bool Couenne::exprLog::impliedBound	(	int	,
		CouNumber *	,
		CouNumber *	,
		t_chg_bounds *	,
		enum	auxSign = `expression::AUX_EQ`
	)

virtual

implied bound processing

Reimplemented from Couenne::expression.

virtual CouNumber Couenne::exprLog::selectBranch	(	const CouenneObject *	obj,
		const OsiBranchingInformation *	info,
		expression *&	var,
		double *&	brpts,
		double *&	brDist,
		int &	way
	)

virtual

set up branching object by evaluating many branching points for each expression's arguments

Reimplemented from Couenne::expression.

virtual bool Couenne::exprLog::isBijective ( ) const

inlinevirtual

return true if feasible

Reimplemented from Couenne::expression.

Definition at line 77 of file CouenneExprLog.hpp.

virtual CouNumber Couenne::exprLog::inverse ( expression * vardep ) const

inlinevirtual

inverse of this operator

Reimplemented from Couenne::expression.

Definition at line 80 of file CouenneExprLog.hpp.

References Couenne::exp().

virtual bool Couenne::exprLog::isCuttable	(	CouenneProblem *	problem,
		int	index
	)		const

virtual

can this expression be further linearized or are we on its concave ("bad") side

Reimplemented from Couenne::expression.

The documentation for this class was generated from the following file:

CouenneExprLog.hpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation