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CglClique Class Reference

`#include <CglClique.hpp>`

Inheritance diagram for CglClique:
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Collaboration diagram for CglClique:
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## Classes
struct | fnode
| A node of the fractional graph. More...
struct | frac_graph
| A graph corresponding to a fractional solution of an LP. More...

## Public Member Functions
| CglClique (const CglClique &rhs)
| Copy constructor. More...
virtual CglCutGenerator * | clone () const
| Clone. More...
CglClique & | operator= (const CglClique &rhs)
| Assignment operator. More...
virtual void | generateCuts (const OsiSolverInterface &si, OsiCuts &cs, const CglTreeInfo info=CglTreeInfo())
| Generate cuts for the model data contained in si. More...
Public Member Functions inherited from CglCutGenerator
| CglCutGenerator ()
| Default constructor. More...
| CglCutGenerator (const CglCutGenerator &)
| Copy constructor. More...
CglCutGenerator & | operator= (const CglCutGenerator &rhs)
| Assignment operator. More...
virtual | ~CglCutGenerator ()
| Destructor. More...
virtual void | refreshSolver (OsiSolverInterface *)
| This can be used to refresh any information. More...
int | getAggressiveness () const
| Get Aggressiveness - 0 = neutral, 100 is normal root node. More...
void | setAggressiveness (int value)
| Set Aggressiveness - 0 = neutral, 100 is normal root node. More...
void | setGlobalCuts (bool trueOrFalse)
| Set whether can do global cuts. More...
bool | canDoGlobalCuts () const
| Say whether can do global cuts. More...
virtual bool | mayGenerateRowCutsInTree () const
| Returns true if may generate Row cuts in tree (rather than root node). More...
virtual bool | needsOptimalBasis () const
| Return true if needs optimal basis to do cuts. More...
virtual int | maximumLengthOfCutInTree () const
| Return maximum length of cut in tree. More...

## Protected Attributes
const int * | cl_perm_indices
| variables/arrays that are used across many methods More...
int | cl_perm_length
| The length of cl_perm_indices. More...
int * | cl_indices
| List of indices that should be considered for extending the ones listed in cl_perm_indices. More...
int | cl_length
| The length of cl_indices. More...
int * | cl_del_indices
| An array of nodes discarded from the candidate list. More...
int | cl_del_length
| The length of cl_del_indices. More...

## Private Member Functions
void | selectFractionalBinaries (const OsiSolverInterface &si)
| Scan through the variables and select those that are binary and are at a fractional level. More...
void | selectFractionals (const OsiSolverInterface &si)
| Scan through the variables and select those that are at a fractional level. More...
void | selectRowCliques (const OsiSolverInterface &si, int numOriginalRows)
void | createSetPackingSubMatrix (const OsiSolverInterface &si)
void | createFractionalGraph ()
int | createNodeNode ()
void | deleteSetPackingSubMatrix ()
void | deleteFractionalGraph ()
void | find_scl (OsiCuts &cs)
void | find_rcl (OsiCuts &cs)
int | scl_choose_next_node (const int current_nodenum, const int *current_indices, const int *current_degrees, const double *current_values)
void | scl_delete_node (const int del_ind, int &current_nodenum, int *current_indices, int *current_degrees, double *current_values)
int | enumerate_maximal_cliques (int &pos, bool *scl_label, OsiCuts &cs)
int | greedy_maximal_clique (OsiCuts &cs)
void | recordClique (const int len, int *indices, OsiCuts &cs)

## Friends
void | CglCliqueUnitTest (const OsiSolverInterface *siP, const std::string mpdDir)
| A function that tests the methods in the CglClique class. More...

## Constructors and destructors
enum | scl_next_node_method { SCL_MIN_DEGREE, SCL_MAX_DEGREE, SCL_MAX_XJ_MAX_DEG }
| possible choices for selecting the next node in the star clique search More...
struct | frac_graph
bool | setPacking_
| An indicator showing whether the whole matrix in the solverinterface is a set packing problem or not. More...
bool | justOriginalRows_
| True if just look at original rows. More...
int | sp_numrows
| pieces of the set packing part of the solverinterface More...
int * | sp_orig_row_ind
int | sp_numcols
int * | sp_orig_col_ind
double * | sp_colsol
int * | sp_col_start
int * | sp_col_ind
int * | sp_row_start
int * | sp_row_ind
frac_graph | fgraph
| the intersection graph corresponding to the set packing problem More...
bool * | node_node
| the node-node incidence matrix of the intersection graph. More...
double | petol
| The primal tolerance in the solverinterface. More...
bool | do_row_clique
| data for the star clique algorithm More...
bool | do_star_clique
| whether to do the star clique algorithm or not. More...
scl_next_node_method | scl_next_node_rule
| How the next node to be added to the star clique should be selected. More...
int | scl_candidate_length_threshold
| In the star clique method the maximal length of the candidate list (those nodes that are in a star, i.e., connected to the center of the star) to allow complete enumeration of maximal cliques. More...
bool | scl_report_result
| whether to give a detailed statistics on the star clique method More...
int | rcl_candidate_length_threshold
| In the row clique method the maximal length of the candidate list (those nodes that can extend the row clique, i.e., connected to all nodes in the row clique) to allow complete enumeration of maximal cliques. More...
bool | rcl_report_result
| whether to give a detailed statistics on the row clique method More...
| CglClique (bool setPacking=false, bool justOriginalRows=false)
| Default constructor. More...
virtual | ~CglClique ()
| Destructor. More...
virtual std::string | generateCpp (FILE *fp)
| Create C++ lines to get to current state. More...
void | considerRows (const int numRows, const int *rowInd)
void | setStarCliqueNextNodeMethod (scl_next_node_method method)
void | setStarCliqueCandidateLengthThreshold (int maxlen)
void | setRowCliqueCandidateLengthThreshold (int maxlen)
void | setStarCliqueReport (bool yesno=true)
void | setRowCliqueReport (bool yesno=true)
void | setDoStarClique (bool yesno=true)
void | setDoRowClique (bool yesno=true)
void | setMinViolation (double minviol)
double | getMinViolation () const

## Additional Inherited Members
Public Attributes inherited from CglCutGenerator
int | aggressive_
| Aggressiveness - 0 = neutral, 100 is normal root node. More...
bool | canDoGlobalCuts_
| True if can do global cuts i.e. no general integers. More...

## Detailed Description

Definition at line 14 of file CglClique.hpp.

## Member Enumeration Documentation

enum CglClique::scl_next_node_method

possible choices for selecting the next node in the star clique search

Enumerator
SCL_MIN_DEGREE |
SCL_MAX_DEGREE |
SCL_MAX_XJ_MAX_DEG |

Definition at line 64 of file CglClique.hpp.

## Constructor & Destructor Documentation

CglClique::CglClique | ( | const CglClique & | rhs | ) |

Copy constructor.

CglClique::CglClique | ( | bool | setPacking = `false`,
|  | bool | justOriginalRows = `false`
| ) |  |

Default constructor.

If the setPacking argument is set to true then CglClique will assume that the problem in the solverinterface passed to the generateCuts() method describes a set packing problem, i.e.,

- all variables are binary
- the matrix is a 0-1 matrix
- all constraints are '= 1' or '<= 1'

Otherwise the user can use the considerRows() method to set the list of clique rows, that is,

- all coeffs corresponding to binary variables at fractional level is 1
- all other coeffs are non-negative
- the constraint is '= 1' or '<= 1'.

If the user does not set the list of clique rows then CglClique will start the generateCuts() methods by scanning the matrix for them. Also justOriginalRows can be set to true to limit clique creation

virtual CglClique::~CglClique | ( |  | ) |
| inline virtual

Destructor.

Definition at line 55 of file CglClique.hpp.

## Member Function Documentation

virtual CglCutGenerator* CglClique::clone | ( |  | ) | const
| virtual

Clone.

Implements CglCutGenerator.

Reimplemented in CglFakeClique.

CglClique& CglClique::operator= | ( | const CglClique & | rhs | ) |

Assignment operator.

virtual void CglClique::generateCuts | ( | const OsiSolverInterface & | si,
|  | OsiCuts & | cs,
|  | const CglTreeInfo | info = `CglTreeInfo()`
| ) |  |
| virtual

Generate cuts for the model data contained in si.

The generated cuts are inserted into and returned in the collection of cuts cs.

Implements CglCutGenerator.

Reimplemented in CglFakeClique.

virtual std::string CglClique::generateCpp | ( | FILE * | fp | ) |
| virtual

Create C++ lines to get to current state.

Reimplemented from CglCutGenerator.

void CglClique::considerRows | ( | const int | numRows,
|  | const int * | rowInd
| ) |  |

void CglClique::setStarCliqueNextNodeMethod | ( | scl_next_node_method | method | ) |
| inline

Definition at line 70 of file CglClique.hpp.

void CglClique::setStarCliqueCandidateLengthThreshold | ( | int | maxlen | ) |
| inline

Definition at line 74 of file CglClique.hpp.

void CglClique::setRowCliqueCandidateLengthThreshold | ( | int | maxlen | ) |
| inline

Definition at line 77 of file CglClique.hpp.

void CglClique::setStarCliqueReport | ( | bool | yesno = `true` | ) |
| inline

Definition at line 81 of file CglClique.hpp.

void CglClique::setRowCliqueReport | ( | bool | yesno = `true` | ) |
| inline

Definition at line 82 of file CglClique.hpp.

void CglClique::setDoStarClique | ( | bool | yesno = `true` | ) |
| inline

Definition at line 84 of file CglClique.hpp.

void CglClique::setDoRowClique | ( | bool | yesno = `true` | ) |
| inline

Definition at line 85 of file CglClique.hpp.

void CglClique::setMinViolation | ( | double | minviol | ) |
| inline

Definition at line 87 of file CglClique.hpp.

double CglClique::getMinViolation | ( |  | ) | const
| inline

Definition at line 88 of file CglClique.hpp.

void CglClique::selectFractionalBinaries | ( | const OsiSolverInterface & | si | ) |
| private

Scan through the variables and select those that are binary and are at a fractional level.

void CglClique::selectFractionals | ( | const OsiSolverInterface & | si | ) |
| private

Scan through the variables and select those that are at a fractional level.

We already know that everything is binary.

void CglClique::selectRowCliques | ( | const OsiSolverInterface & | si,
|  | int | numOriginalRows
| ) |  |
| private

void CglClique::createSetPackingSubMatrix | ( | const OsiSolverInterface & | si | ) |
| private

void CglClique::createFractionalGraph | ( |  | ) |
| private

int CglClique::createNodeNode | ( |  | ) |
| private

void CglClique::deleteSetPackingSubMatrix | ( |  | ) |
| private

void CglClique::deleteFractionalGraph | ( |  | ) |
| private

void CglClique::find_scl | ( | OsiCuts & | cs | ) |
| private

void CglClique::find_rcl | ( | OsiCuts & | cs | ) |
| private

int CglClique::scl_choose_next_node | ( | const int | current_nodenum,
|  | const int * | current_indices,
|  | const int * | current_degrees,
|  | const double * | current_values
| ) |  |
| private

void CglClique::scl_delete_node | ( | const int | del_ind,
|  | int & | current_nodenum,
|  | int * | current_indices,
|  | int * | current_degrees,
|  | double * | current_values
| ) |  |
| private

int CglClique::enumerate_maximal_cliques | ( | int & | pos,
|  | bool * | scl_label,
|  | OsiCuts & | cs
| ) |  |
| private

int CglClique::greedy_maximal_clique | ( | OsiCuts & | cs | ) |
| private

void CglClique::recordClique | ( | const int | len,
|  | int * | indices,
|  | OsiCuts & | cs
| ) |  |
| private

## Friends And Related Function Documentation

friend struct frac_graph
| friend

Definition at line 92 of file CglClique.hpp.

void CglCliqueUnitTest | ( | const OsiSolverInterface * | siP,
|  | const std::string | mpdDir
| ) |  |
| friend

A function that tests the methods in the CglClique class.

The only reason for it not to be a member method is that this way it doesn't have to be compiled into the library. And that's a gain, because the library should be compiled with optimization on, but this method should be compiled with debugging.

## Member Data Documentation

bool CglClique::setPacking_
| protected

An indicator showing whether the whole matrix in the solverinterface is a set packing problem or not.

Definition at line 139 of file CglClique.hpp.

bool CglClique::justOriginalRows_
| protected

True if just look at original rows.

Definition at line 141 of file CglClique.hpp.

int CglClique::sp_numrows
| protected

pieces of the set packing part of the solverinterface

Definition at line 143 of file CglClique.hpp.

int* CglClique::sp_orig_row_ind
| protected

Definition at line 144 of file CglClique.hpp.

int CglClique::sp_numcols
| protected

Definition at line 145 of file CglClique.hpp.

int* CglClique::sp_orig_col_ind
| protected

Definition at line 146 of file CglClique.hpp.

double* CglClique::sp_colsol
| protected

Definition at line 147 of file CglClique.hpp.

int* CglClique::sp_col_start
| protected

Definition at line 148 of file CglClique.hpp.

int* CglClique::sp_col_ind
| protected

Definition at line 149 of file CglClique.hpp.

int* CglClique::sp_row_start
| protected

Definition at line 150 of file CglClique.hpp.

int* CglClique::sp_row_ind
| protected

Definition at line 151 of file CglClique.hpp.

frac_graph CglClique::fgraph
| protected

the intersection graph corresponding to the set packing problem

Definition at line 154 of file CglClique.hpp.

bool* CglClique::node_node
| protected

the node-node incidence matrix of the intersection graph.

Definition at line 156 of file CglClique.hpp.

double CglClique::petol
| protected

The primal tolerance in the solverinterface.

Definition at line 159 of file CglClique.hpp.

bool CglClique::do_row_clique
| protected

data for the star clique algorithm

Parameters whether to do the row clique algorithm or not.

Definition at line 166 of file CglClique.hpp.

bool CglClique::do_star_clique
| protected

whether to do the star clique algorithm or not.

Definition at line 168 of file CglClique.hpp.

scl_next_node_method CglClique::scl_next_node_rule
| protected

How the next node to be added to the star clique should be selected.

Definition at line 171 of file CglClique.hpp.

int CglClique::scl_candidate_length_threshold
| protected

In the star clique method the maximal length of the candidate list (those nodes that are in a star, i.e., connected to the center of the star) to allow complete enumeration of maximal cliques.

Otherwise a greedy algorithm is used.

Definition at line 176 of file CglClique.hpp.

bool CglClique::scl_report_result
| protected

whether to give a detailed statistics on the star clique method

Definition at line 178 of file CglClique.hpp.

int CglClique::rcl_candidate_length_threshold
| protected

In the row clique method the maximal length of the candidate list (those nodes that can extend the row clique, i.e., connected to all nodes in the row clique) to allow complete enumeration of maximal cliques.

Otherwise a greedy algorithm is used.

Definition at line 184 of file CglClique.hpp.

bool CglClique::rcl_report_result
| protected

whether to give a detailed statistics on the row clique method

Definition at line 186 of file CglClique.hpp.

const int* CglClique::cl_perm_indices
| protected

variables/arrays that are used across many methods

List of indices that must be in the to be created clique. This is just a pointer, it is never new'd and therefore does not need to be delete[]'d either.

Definition at line 194 of file CglClique.hpp.

int CglClique::cl_perm_length
| protected

The length of cl_perm_indices.

Definition at line 196 of file CglClique.hpp.

int* CglClique::cl_indices
| protected

List of indices that should be considered for extending the ones listed in cl_perm_indices.

Definition at line 200 of file CglClique.hpp.

int CglClique::cl_length
| protected

The length of cl_indices.

Definition at line 202 of file CglClique.hpp.

int* CglClique::cl_del_indices
| protected

An array of nodes discarded from the candidate list.

These are rechecked when a maximal clique is found just to make sure that the clique is really maximal.

Definition at line 207 of file CglClique.hpp.

int CglClique::cl_del_length
| protected

The length of cl_del_indices.

Definition at line 209 of file CglClique.hpp.

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

- /home/coin/svn-release/Cgl-0.59.7/Cgl/src/CglClique/CglClique.hpp