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Couenne
0.2
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Couenne
0.2
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class to compute lower bound of a fraction based on the bounds of both numerator and denominator More...
#include <CouenneExprBQuad.hpp>
Public Member Functions | |
| exprLBQuad (exprQuad *ref) | |
| Constructor. More... | |
| exprLBQuad (const exprLBQuad &src, Domain *d=NULL) | |
| copy constructor More... | |
| ~exprLBQuad () | |
| destructor More... | |
| expression * | clone (Domain *d=NULL) const |
| cloning method More... | |
| CouNumber | operator() () |
| function for the evaluation of the expression More... | |
| virtual void | print (std::ostream &s=std::cout, bool descend=false) const |
| I/O. 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 int | nArgs () const |
| return number of arguments (when applicable, that is, with N-ary functions) 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 * | Argument () const |
| return argument (when applicable, i.e., with univariate functions) More... | |
| virtual expression ** | ArgPtr () |
| return pointer to argument (when applicable, i.e., with univariate functions) More... | |
| virtual enum nodeType | Type () const |
| node type 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 CouNumber | gradientNorm (const double *x) |
| return l-2 norm of gradient at given point More... | |
| virtual expression * | differentiate (int) |
| differentiation 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 int | DepList (std::set< int > &deplist, enum dig_type type=ORIG_ONLY) |
| fill std::set with indices of variables on which this expression depends. More... | |
| virtual expression * | simplify () |
| simplify expression (useful for derivatives) More... | |
| virtual int | Linearity () |
| get a measure of "how linear" the expression is (see CouenneTypes.h) More... | |
| virtual bool | isDefinedInteger () |
| is this expression defined as an integer? More... | |
| virtual bool | isInteger () |
| is this expression integer? More... | |
| virtual void | getBounds (expression *&, expression *&) |
| Get lower and upper bound of an expression (if any) More... | |
| virtual void | getBounds (CouNumber &, CouNumber &) |
| Get lower and upper bound of an expression (if any) – real values. More... | |
| virtual exprAux * | standardize (CouenneProblem *p, bool addAux=true) |
| Create standard form of this expression, by: More... | |
| virtual void | generateCuts (expression *w, OsiCuts &cs, const CouenneCutGenerator *cg, t_chg_bounds *chg=NULL, int wind=-1, CouNumber lb=-COUENNE_INFINITY, CouNumber ub=COUENNE_INFINITY) |
| generate convexification cut for constraint w = this More... | |
| virtual enum expr_type | code () |
| return integer for comparing expressions (used to recognize common expression) 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 | rank () |
| used in rank-based branching variable choice: original variables have rank 1; auxiliary w=f(x) has rank r(w) = r(x)+1; finally, auxiliary w=f(x1,x2...,xk) has rank r(w) = 1+max{r(xi):i=1..k}. More... | |
| virtual bool | impliedBound (int, CouNumber *, CouNumber *, t_chg_bounds *, enum auxSign=expression::AUX_EQ) |
| does a backward implied bound processing on every expression, including exprSums although already done by Clp (useful when repeated within Couenne). More... | |
| virtual int | Multiplicity () |
| multiplicity of a variable 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 void | replace (exprVar *, exprVar *) |
| replace expression with another More... | |
| virtual void | fillDepSet (std::set< DepNode *, compNode > *, DepGraph *) |
| update dependence set with index of variables on which this expression depends More... | |
| virtual void | linkDomain (Domain *d) |
| empty function to update domain pointer More... | |
| virtual void | realign (const CouenneProblem *p) |
| empty function to redirect variables to proper variable vector More... | |
| virtual bool | isBijective () const |
| indicating if function is monotonically increasing More... | |
| virtual CouNumber | inverse (expression *vardep) const |
| compute the inverse function More... | |
| virtual void | closestFeasible (expression *varind, expression *vardep, CouNumber &left, CouNumber &right) const |
| closest feasible points in function in both directions More... | |
| virtual bool | isCuttable (CouenneProblem *problem, int index) const |
| can this expression be further linearized or are we on its concave ("bad") side 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... | |
Private Attributes | |
| exprQuad * | ref_ |
| quadratic form, reference expression 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... | |
class to compute lower bound of a fraction based on the bounds of both numerator and denominator
Definition at line 22 of file CouenneExprBQuad.hpp.
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inline |
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inline |
copy constructor
Definition at line 33 of file CouenneExprBQuad.hpp.
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inline |
destructor
Definition at line 39 of file CouenneExprBQuad.hpp.
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inlinevirtual |
cloning method
Reimplemented from Couenne::expression.
Definition at line 42 of file CouenneExprBQuad.hpp.
References exprLBQuad().
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inlinevirtual |
function for the evaluation of the expression
Implements Couenne::expression.
Definition at line 46 of file CouenneExprBQuad.hpp.
References ref_.
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inlinevirtual |
I/O.
Reimplemented from Couenne::expression.
Definition at line 50 of file CouenneExprBQuad.hpp.
References ref_.
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private |
quadratic form, reference expression
Definition at line 24 of file CouenneExprBQuad.hpp.
Referenced by operator()(), and print().
1.8.5