Couenne 0.5.8
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These are bound expression classes. More...
#include <CouenneExprBound.hpp>
Public Member Functions | |
enum nodeType | Type () const |
Node type. | |
exprLowerBound (int varIndex, Domain *d=NULL) | |
Constructor. | |
exprLowerBound (const exprLowerBound &src, Domain *d=NULL) | |
Copy constructor. | |
exprLowerBound * | clone (Domain *d=NULL) const |
cloning method | |
void | print (std::ostream &out=std::cout, bool=false) const |
Print to iostream. | |
CouNumber | operator() () |
return the value of the variable | |
expression * | differentiate (int) |
differentiation | |
int | dependsOn (int *, int, enum dig_type type=STOP_AT_AUX) |
dependence on variable set | |
virtual int | Linearity () |
get a measure of "how linear" the expression is: | |
virtual enum expr_type | code () |
code for comparisons | |
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exprVar (int varIndex, Domain *d=NULL) | |
Constructor. | |
virtual | ~exprVar () |
destructor | |
exprVar (const exprVar &e, Domain *d=NULL) | |
Copy constructor. | |
int | Index () const |
Get variable index in problem. | |
virtual expression * | Lb () |
Get lower bound expression. | |
virtual expression * | Ub () |
Get upper bound expression. | |
virtual CouNumber & | lb () |
Get/set lower bound value. | |
virtual CouNumber & | ub () |
Get/set upper bound value. | |
virtual CouNumber | gradientNorm (const double *x) |
return l-2 norm of gradient at given point | |
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 | |
virtual void | crossBounds () |
set bounds depending on both branching rules and propagated bounds. | |
virtual expression * | simplify () |
simplify | |
virtual bool | isDefinedInteger () |
is this expression defined as an integer? | |
virtual bool | isInteger () |
is this variable integer? | |
virtual void | getBounds (expression *&, expression *&) |
Get expressions of lower and upper bound of an expression (if any) | |
virtual void | getBounds (CouNumber &lb, CouNumber &ub) |
Get value of lower and upper bound of an expression (if any) | |
virtual void | generateCuts (OsiCuts &, const CouenneCutGenerator *, t_chg_bounds *=NULL, int=-1, CouNumber=-COUENNE_INFINITY, CouNumber=COUENNE_INFINITY) |
Get values of lower and upper bound of an expression (if any) | |
virtual void | generateCuts (expression *w, OsiCuts &cs, const CouenneCutGenerator *cg, t_chg_bounds *=NULL, int=-1, CouNumber=-COUENNE_INFINITY, CouNumber=COUENNE_INFINITY) |
generate convexification cut for constraint w = this | |
virtual bool | impliedBound (int, CouNumber *, CouNumber *, t_chg_bounds *, enum auxSign=expression::AUX_EQ) |
implied bound processing | |
virtual int | rank () |
rank of an original variable is always one | |
virtual void | fillDepSet (std::set< DepNode *, compNode > *, DepGraph *) |
update dependence set with index of this variable | |
virtual bool | isFixed () |
is this variable fixed? | |
virtual void | linkDomain (Domain *d) |
link this variable to a domain | |
virtual Domain * | domain () |
return pointer to variable domain | |
virtual void | decreaseMult () |
virtual void | zeroMult () |
Disable variable (empty for compatibility with exprAux) | |
virtual void | setInteger (bool value) |
Set this variable as integer (empty for compatibility with exprAux) | |
virtual enum convexity | convexity () const |
either CONVEX, CONCAVE, AFFINE, or NONCONVEX | |
virtual CouenneObject * | properObject (CouenneCutGenerator *c, CouenneProblem *p, Bonmin::BabSetupBase *base, JnlstPtr jnlst_) |
return proper object to handle expression associated with this variable (NULL if this is not an auxiliary) | |
virtual enum auxSign | sign () const |
return its sign in the definition constraint | |
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expression () | |
Constructor. | |
expression (const expression &e, Domain *d=NULL) | |
Copy constructor. | |
virtual | ~expression () |
Destructor. | |
virtual int | nArgs () const |
return number of arguments (when applicable, that is, with N-ary functions) | |
virtual expression ** | ArgList () const |
return arglist (when applicable, that is, with N-ary functions) | |
virtual void | ArgList (expression **al) |
set arglist (used in deleting nodes without deleting children) | |
virtual expression * | Argument () const |
return argument (when applicable, i.e., with univariate functions) | |
virtual expression ** | ArgPtr () |
return pointer to argument (when applicable, i.e., with univariate functions) | |
virtual expression * | Image () const |
return pointer to corresponding expression (for auxiliary variables only) | |
virtual void | Image (expression *image) |
set expression associated with this auxiliary variable (for compatibility with exprAux) | |
virtual CouNumber | Value () const |
value (empty) | |
virtual const expression * | Original () const |
If this is an exprClone of a exprClone of an expr? | |
int | dependsOn (int singleton, enum dig_type type=STOP_AT_AUX) |
version with one index only | |
virtual exprAux * | standardize (CouenneProblem *p, bool addAux=true) |
Create standard form of this expression, by: | |
virtual int | compare (expression &) |
compare expressions | |
virtual int | compare (exprCopy &) |
compare copies of expressions | |
virtual int | Multiplicity () |
multiplicity of a variable | |
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. | |
virtual void | replace (exprVar *, exprVar *) |
replace expression with another | |
virtual void | realign (const CouenneProblem *p) |
empty function to redirect variables to proper variable vector | |
virtual bool | isBijective () const |
indicating if function is monotonically increasing | |
virtual CouNumber | inverse (expression *vardep) const |
compute the inverse function | |
virtual void | closestFeasible (expression *varind, expression *vardep, CouNumber &left, CouNumber &right) const |
closest feasible points in function in both directions | |
virtual bool | isCuttable (CouenneProblem *problem, int index) const |
can this expression be further linearized or are we on its concave ("bad") side | |
virtual bool | isaCopy () const |
return true if this is a copy of something (i.e. an exprCopy) | |
virtual expression * | Copy () const |
return copy of this expression (only makes sense in exprCopy) | |
Additional Inherited Members | |
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enum | auxSign { AUX_UNDEF =-2 , AUX_LEQ =-1 , AUX_EQ , AUX_GEQ } |
"sign" of the constraint defining an auxiliary. More... | |
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int | varIndex_ |
The index of the variable. | |
Domain * | domain_ |
Pointer to a descriptor of the current point/bounds. | |
These are bound expression classes.
They are used in the parametric convexification part to obtain lower/upper bounds of an expression as a function of the expression itself.
For example, the lower and upper bounds to expression (x1 - exp (x2)) are (l1 - exp (u2)) and (u1 - exp (l2)), respectively, where l1 (l2) is the lower bound of x1 (x2) and u1 (u2) is the upper bound of x1 (x2).
A lower/upper bound of an expression is a function of all bounds in the expression and is known only when all variables bounds are known. lower bound
Definition at line 38 of file CouenneExprBound.hpp.
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inline |
Constructor.
Definition at line 47 of file CouenneExprBound.hpp.
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inline |
Copy constructor.
Definition at line 51 of file CouenneExprBound.hpp.
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inlinevirtual |
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inlinevirtual |
cloning method
Reimplemented from Couenne::exprVar.
Definition at line 55 of file CouenneExprBound.hpp.
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inlinevirtual |
Print to iostream.
Reimplemented from Couenne::exprVar.
Definition at line 59 of file CouenneExprBound.hpp.
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inlinevirtual |
return the value of the variable
Reimplemented from Couenne::exprVar.
Definition at line 64 of file CouenneExprBound.hpp.
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inlinevirtual |
differentiation
Reimplemented from Couenne::exprVar.
Definition at line 68 of file CouenneExprBound.hpp.
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inlinevirtual |
dependence on variable set
Reimplemented from Couenne::expression.
Definition at line 72 of file CouenneExprBound.hpp.
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inlinevirtual |
get a measure of "how linear" the expression is:
Reimplemented from Couenne::exprVar.
Definition at line 76 of file CouenneExprBound.hpp.
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inlinevirtual |
code for comparisons
Reimplemented from Couenne::exprVar.
Definition at line 80 of file CouenneExprBound.hpp.