An efficient unconstrained elimination sequence algorithm. More...

#include <defaultEliminationSequenceStrategy.h>

Inheritance diagram for gum::DefaultEliminationSequenceStrategy:

Collaboration diagram for gum::DefaultEliminationSequenceStrategy:

Public Member Functions
Constructors / Destructors
	DefaultEliminationSequenceStrategy (double theRatio=GUM_QUASI_RATIO, double theThreshold=GUM_WEIGHT_THRESHOLD)
	default constructor (uses an empty graph)
	DefaultEliminationSequenceStrategy (UndiGraph graph, const NodeProperty< Size > dom_sizes, double ratio=GUM_QUASI_RATIO, double threshold=GUM_WEIGHT_THRESHOLD)
	constructor for a (tensorly) non empty graph
	DefaultEliminationSequenceStrategy (const DefaultEliminationSequenceStrategy &from)
	copy constructor
	DefaultEliminationSequenceStrategy (DefaultEliminationSequenceStrategy &&)
	move constructor
virtual	~DefaultEliminationSequenceStrategy ()
	destructor
virtual DefaultEliminationSequenceStrategy *	newFactory () const final
	creates a new elimination sequence of the same type as the current object, but this sequence contains only an empty graph
virtual DefaultEliminationSequenceStrategy *	copyFactory () const final
	virtual copy constructor
Accessors / Modifiers
virtual bool	setGraph (UndiGraph graph, const NodeProperty< Size > dom_sizes) final
	sets a new graph to be triangulated
virtual void	clear () final
	clears the sequence (to prepare, for instance, a new elimination sequence)
virtual NodeId	nextNodeToEliminate () final
	returns the new node to be eliminated within the triangulation algorithm
virtual void	askFillIns (bool do_it) final
	if the elimination sequence is able to compute fill-ins, we indicate whether we want this feature to be activated
virtual bool	providesFillIns () const final
	indicates whether the fill-ins generated by the eliminated nodes, if needed, will be computed by the elimination sequence, or need be computed by the triangulation itself.
virtual bool	providesGraphUpdate () const final
	indicates whether the elimination sequence updates by itself the graph after a node has been eliminated
virtual void	eliminationUpdate (const NodeId node) final
	performs all the graph/fill-ins updates provided (if any)
virtual const EdgeSet &	fillIns () final
	in case fill-ins are provided, this function returns the fill-ins due to all the nodes eliminated so far
Accessors / Modifiers
UndiGraph *	graph () const noexcept
	returns the current graph
const NodeProperty< Size > *	domainSizes () const noexcept
	returns the current domain sizes

Protected Attributes
UndiGraph *	graph_ {nullptr}
	the graph to be triangulated
const NodeProperty< Size > *	domain_sizes_ {nullptr}
	the domain sizes of the variables/nodes
NodeProperty< double >	log_domain_sizes_
	the log of the domain sizes of the variables/nodes

Private Member Functions
void	_createSimplicialSet_ ()
	create a new simplicial set suited for the current graph

Static Private Member Functions
static const EdgeSet &	_empty_fill_ins_ ()
	an empty fill-ins set used by default

Private Attributes
NodeProperty< double >	_log_weights_
	for each node, the weight of the clique created by the node's elimination
SimplicialSet *	_simplicial_set_ {nullptr}
	the simplicial set used for determining the best nodes to eliminate
double	_simplicial_ratio_
	the ratio used by simplicial_set for its quasi-simplicial nodes
double	_simplicial_threshold_
	the threshold used by simplicial_set to determine small cliques
bool	_provide_fill_ins_ {false}
	indicates whether we compute new fill-ins

Detailed Description

An efficient unconstrained elimination sequence algorithm.

Class DefaultEliminationSequenceStrategy implements an unconstrained elimination sequence algorithm (that is, there is no external constraint on the possible elimination ordering). The ordering is determined as follows:

the nodes that are simplicial (i.e., those that already form a clique

with their neighbors) are eliminated first

then the nodes that are almost simplicial (i.e., if we remove one of

their neighbors, they become simplicial) and that create small cliques,

are eliminated

the quasi simplicial nodes (i.e., the nodes that do not require many

fill-ins to create cliques) that would create small cliques, are eliminated

finally, the heuristic proposed by Kjaerulff(90) is used to compute the

last nodes to be eliminated.

Definition at line 94 of file defaultEliminationSequenceStrategy.h.

Constructor & Destructor Documentation

◆ DefaultEliminationSequenceStrategy() [1/4]

gum::DefaultEliminationSequenceStrategy::DefaultEliminationSequenceStrategy	(	double	theRatio = GUM_QUASI_RATIO,
		double	theThreshold = GUM_WEIGHT_THRESHOLD )

default constructor (uses an empty graph)

Parameters

theRatio	the ratio used by the SimplicialSet included in the DefaultEliminationSequenceStrategy
theThreshold	the weight threshhold of the SimplicialSet included in the DefaultEliminationSequenceStrategy

Definition at line 57 of file defaultEliminationSequenceStrategy.cpp.

                                                                                              :
      _simplicial_ratio_(theRatio), _simplicial_threshold_(theThreshold) {
    GUM_CONSTRUCTOR(DefaultEliminationSequenceStrategy);
  }

References DefaultEliminationSequenceStrategy(), _simplicial_ratio_, and _simplicial_threshold_.

Referenced by DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), ~DefaultEliminationSequenceStrategy(), copyFactory(), and newFactory().

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◆ DefaultEliminationSequenceStrategy() [2/4]

gum::DefaultEliminationSequenceStrategy::DefaultEliminationSequenceStrategy	(	UndiGraph *	graph,
		const NodeProperty< Size > *	dom_sizes,
		double	ratio = GUM_QUASI_RATIO,
		double	threshold = GUM_WEIGHT_THRESHOLD )

constructor for a (tensorly) non empty graph

Parameters

graph	the graph to be triangulated, i.e., the nodes of which will be eliminated
dom_sizes	the domain sizes of the nodes to be eliminated
ratio	the ratio used by the SimplicialSet included in the DefaultEliminationSequenceStrategy
threshold	the weight threshhold of the SimplicialSet included in the DefaultEliminationSequenceStrategy

Warning: Note that we allow dom_sizes to be defined over nodes/variables that do not belong to graph. These sizes will simply be ignored. However, it is compulsory that all the nodes of graph belong to dom_sizes; the graph is altered during the triangulation.; note that, by aGrUM's rule, the graph and the domain sizes are not copied but only referenced by the elimination sequence algorithm.

Definition at line 64 of file defaultEliminationSequenceStrategy.cpp.

                        : _simplicial_ratio_(ratio), _simplicial_threshold_(threshold) {
    setGraph(graph, domain_sizes);
 
    GUM_CONSTRUCTOR(DefaultEliminationSequenceStrategy);
  }

References DefaultEliminationSequenceStrategy(), _simplicial_ratio_, _simplicial_threshold_, gum::EliminationSequenceStrategy::graph(), and setGraph().

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◆ DefaultEliminationSequenceStrategy() [3/4]

gum::DefaultEliminationSequenceStrategy::DefaultEliminationSequenceStrategy ( const DefaultEliminationSequenceStrategy & from )

copy constructor

Warning: The newly created elimination sequence strategy points toward the same undirected graph as the one contained in from but each strategy possesses its own simplicial set. As a result, if both elimination strategies are used at the same time, they will probably result in a mess because their simplicial sets won't be synchronized correctly with the changing undirected graph. So, whenever using this copy constructor, be sure that either from or the newly created strategy is used for a triangulation but not both. This will necessarily be OK in DefaultTriangulations.

Definition at line 75 of file defaultEliminationSequenceStrategy.cpp.

                                                      :
      UnconstrainedEliminationSequenceStrategy(from),
      // no need to set  _log_weights_ because the copy of the simplicial set
      // will set it properly
      _simplicial_set_(new SimplicialSet(*from._simplicial_set_,
                                         graph_,
                                         &log_domain_sizes_,
                                         &_log_weights_,
                                         false)),
      _simplicial_ratio_(from._simplicial_ratio_),
      _simplicial_threshold_(from._simplicial_threshold_),
      _provide_fill_ins_(from._provide_fill_ins_) {
    GUM_CONS_CPY(DefaultEliminationSequenceStrategy);
  }

References DefaultEliminationSequenceStrategy(), gum::UnconstrainedEliminationSequenceStrategy::UnconstrainedEliminationSequenceStrategy(), _log_weights_, _provide_fill_ins_, _simplicial_ratio_, _simplicial_set_, _simplicial_threshold_, gum::EliminationSequenceStrategy::graph_, and gum::EliminationSequenceStrategy::log_domain_sizes_.

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◆ DefaultEliminationSequenceStrategy() [4/4]

gum::DefaultEliminationSequenceStrategy::DefaultEliminationSequenceStrategy ( DefaultEliminationSequenceStrategy && from )

move constructor

Definition at line 92 of file defaultEliminationSequenceStrategy.cpp.

                                                 :
      UnconstrainedEliminationSequenceStrategy(std::move(from)),
      _log_weights_(std::move(from._log_weights_)), _simplicial_set_(from._simplicial_set_),
      _simplicial_ratio_(from._simplicial_ratio_),
      _simplicial_threshold_(from._simplicial_threshold_),
      _provide_fill_ins_(from._provide_fill_ins_) {
    _simplicial_set_->replaceLogWeights(&from._log_weights_, &_log_weights_);
    from._simplicial_set_ = nullptr;
 
    GUM_CONS_MOV(DefaultEliminationSequenceStrategy);
  }

References DefaultEliminationSequenceStrategy(), gum::UnconstrainedEliminationSequenceStrategy::UnconstrainedEliminationSequenceStrategy(), _log_weights_, _provide_fill_ins_, _simplicial_ratio_, _simplicial_set_, and _simplicial_threshold_.

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◆ ~DefaultEliminationSequenceStrategy()

gum::DefaultEliminationSequenceStrategy::~DefaultEliminationSequenceStrategy ( )

virtual

destructor

Definition at line 106 of file defaultEliminationSequenceStrategy.cpp.

                                                                          {
    GUM_DESTRUCTOR(DefaultEliminationSequenceStrategy);
 
    if (_simplicial_set_ != nullptr) delete _simplicial_set_;
  }

References DefaultEliminationSequenceStrategy(), and _simplicial_set_.

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Member Function Documentation

◆ _createSimplicialSet_()

void gum::DefaultEliminationSequenceStrategy::_createSimplicialSet_ ( )

private

create a new simplicial set suited for the current graph

Definition at line 124 of file defaultEliminationSequenceStrategy.cpp.

                                                                 {
    // remove the old simplicial set, if any
    if (_simplicial_set_ != nullptr) {
      delete _simplicial_set_;
      _simplicial_set_ = nullptr;
    }
 
    if (graph_ != nullptr) {
      // create a simplicial set suited for the graph
      _simplicial_set_ = new SimplicialSet(graph_,
                                           &log_domain_sizes_,
                                           &_log_weights_,
                                           _simplicial_ratio_,
                                           _simplicial_threshold_);
 
      _simplicial_set_->setFillIns(_provide_fill_ins_);
    }
  }

References _log_weights_, _provide_fill_ins_, _simplicial_ratio_, _simplicial_set_, _simplicial_threshold_, gum::EliminationSequenceStrategy::graph_, and gum::EliminationSequenceStrategy::log_domain_sizes_.

Referenced by setGraph().

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◆ _empty_fill_ins_()

const EdgeSet & gum::EliminationSequenceStrategy::_empty_fill_ins_ ( )

staticprivateinherited

an empty fill-ins set used by default

Definition at line 60 of file eliminationSequenceStrategy.cpp.

                                                               {
#ifdef GUM_DEBUG_MODE
    static bool first_use = true;
    if (first_use) {
      first_use = false;
      __debug__::_dec_creation_("Set", " __empty_edge_set", 0, "static variable correction", 0);
      __debug__::_dec_creation_("HashTable",
                                " __empty_edge_set",
                                0,
                                "static variable correction",
                                0);
    }
#endif
    static EdgeSet empty_fill_ins;
    return empty_fill_ins;
  }

Referenced by fillIns().

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◆ askFillIns()

void gum::DefaultEliminationSequenceStrategy::askFillIns ( bool do_it )

finalvirtual

if the elimination sequence is able to compute fill-ins, we indicate whether we want this feature to be activated

Parameters

do_it when true and the elimination sequence has the ability to compute fill-ins, the elimination sequence will actually compute them (for the triangulation to use them), else they will not be available.

Implements gum::EliminationSequenceStrategy.

Definition at line 201 of file defaultEliminationSequenceStrategy.cpp.

                                                                {
    _provide_fill_ins_ = do_it;
 
    if (_simplicial_set_ != nullptr) _simplicial_set_->setFillIns(_provide_fill_ins_);
  }

References _provide_fill_ins_, and _simplicial_set_.

◆ clear()

void gum::DefaultEliminationSequenceStrategy::clear ( )

finalvirtual

clears the sequence (to prepare, for instance, a new elimination sequence)

Reimplemented from gum::EliminationSequenceStrategy.

Definition at line 155 of file defaultEliminationSequenceStrategy.cpp.

                                                 {
    UnconstrainedEliminationSequenceStrategy::clear();
 
    _log_weights_.clear();
    if (_simplicial_set_ != nullptr) {
      delete _simplicial_set_;
      _simplicial_set_ = nullptr;
    }
  }

References _log_weights_, _simplicial_set_, and gum::EliminationSequenceStrategy::clear().

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◆ copyFactory()

DefaultEliminationSequenceStrategy * gum::DefaultEliminationSequenceStrategy::copyFactory ( ) const

finalvirtual

virtual copy constructor

Warning: The newly created elimination sequence strategy points toward the same undirected graph as the one contained in the current strategy but each strategy possesses its own simplicial set. As a result, if both elimination strategies are used at the same time, they will probably result in a mess because their simplicial sets won't be synchronized correctly with the changing undirected graph. So, whenever using this virtual copy constructor, be sure that either the current or the newly created strategy is used for a triangulation but not both. This will necessarily be OK in DefaultTriangulations.

Implements gum::UnconstrainedEliminationSequenceStrategy.

Definition at line 119 of file defaultEliminationSequenceStrategy.cpp.

                                                                                            {
    return new DefaultEliminationSequenceStrategy(*this);
  }

References DefaultEliminationSequenceStrategy().

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◆ domainSizes()

INLINE const NodeProperty< Size > * gum::EliminationSequenceStrategy::domainSizes ( ) const

noexceptinherited

returns the current domain sizes

Definition at line 59 of file eliminationSequenceStrategy_inl.h.

                                                                                             {
    return domain_sizes_;
  }

References domain_sizes_.

Referenced by providesGraphUpdate().

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◆ eliminationUpdate()

void gum::DefaultEliminationSequenceStrategy::eliminationUpdate ( const NodeId node )

finalvirtual

performs all the graph/fill-ins updates provided (if any)

performs all the graph/fill-ins updates provided

Parameters

node	the node the elimination of which requires the graph update

Reimplemented from gum::EliminationSequenceStrategy.

Definition at line 217 of file defaultEliminationSequenceStrategy.cpp.

                                                                            {
    if (_simplicial_set_ != nullptr) {
      _simplicial_set_->makeClique(id);
      _simplicial_set_->eraseClique(id);
    }
  }

References _simplicial_set_.

◆ fillIns()

const EdgeSet & gum::DefaultEliminationSequenceStrategy::fillIns ( )

finalvirtual

in case fill-ins are provided, this function returns the fill-ins due to all the nodes eliminated so far

in case fill-ins are provided, this function returns the fill-ins generated after the last node elimination

Reimplemented from gum::EliminationSequenceStrategy.

Definition at line 226 of file defaultEliminationSequenceStrategy.cpp.

                                                             {
    if (!_provide_fill_ins_ || (_simplicial_set_ == nullptr))
      return UnconstrainedEliminationSequenceStrategy::fillIns();
    else return _simplicial_set_->fillIns();
  }

References _provide_fill_ins_, _simplicial_set_, and gum::EliminationSequenceStrategy::fillIns().

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◆ graph()

INLINE UndiGraph * gum::EliminationSequenceStrategy::graph ( ) const

noexceptinherited

returns the current graph

Definition at line 56 of file eliminationSequenceStrategy_inl.h.

56{ return graph_; }

References graph_.

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◆ newFactory()

DefaultEliminationSequenceStrategy * gum::DefaultEliminationSequenceStrategy::newFactory ( ) const

finalvirtual

creates a new elimination sequence of the same type as the current object, but this sequence contains only an empty graph

Warning: you must deallocate by yourself the object returned

Returns: an empty clone of the current object with the same type

Implements gum::UnconstrainedEliminationSequenceStrategy.

Definition at line 114 of file defaultEliminationSequenceStrategy.cpp.

                                                                                           {
    return new DefaultEliminationSequenceStrategy(_simplicial_ratio_, _simplicial_threshold_);
  }

References DefaultEliminationSequenceStrategy(), _simplicial_ratio_, and _simplicial_threshold_.

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◆ nextNodeToEliminate()

NodeId gum::DefaultEliminationSequenceStrategy::nextNodeToEliminate ( )

finalvirtual

returns the new node to be eliminated within the triangulation algorithm

Exceptions

NotFound exception is thrown if there is no more node to eliminate in the graph

Implements gum::EliminationSequenceStrategy.

Definition at line 166 of file defaultEliminationSequenceStrategy.cpp.

                                                                 {
    // if there is no simplicial set, send an exception
    if (graph_ == nullptr) { GUM_ERROR(NotFound, "the graph is empty") }
 
    // select a node to be eliminated: try simplicial nodes, then almost
    // simplicial nodes, then quasi-simplicial nodes
    // note that if  _graph_ != 0,  _simplicial_set_ has been allocated
    if (_simplicial_set_->hasSimplicialNode()) return _simplicial_set_->bestSimplicialNode();
    else if (_simplicial_set_->hasAlmostSimplicialNode())
      return _simplicial_set_->bestAlmostSimplicialNode();
    else if (_simplicial_set_->hasQuasiSimplicialNode())
      return _simplicial_set_->bestQuasiSimplicialNode();
    else {
      // here: select the node through Kjaerulff's heuristic
      auto iter_heuristic = _log_weights_.cbegin();
 
      if (iter_heuristic == _log_weights_.cend())
        GUM_ERROR(NotFound, "there exists no more node to eliminate")
 
      double min_weight     = iter_heuristic.val();
      NodeId removable_node = iter_heuristic.key();
      for (++iter_heuristic; iter_heuristic != _log_weights_.cend(); ++iter_heuristic) {
        if (iter_heuristic.val() < min_weight) {
          removable_node = iter_heuristic.key();
          min_weight     = iter_heuristic.val();
        }
      }
 
      return removable_node;
    }
  }

References _log_weights_, _simplicial_set_, gum::EliminationSequenceStrategy::graph_, and GUM_ERROR.

◆ providesFillIns()

bool gum::DefaultEliminationSequenceStrategy::providesFillIns ( ) const

finalvirtual

indicates whether the fill-ins generated by the eliminated nodes, if needed, will be computed by the elimination sequence, or need be computed by the triangulation itself.

indicates whether the new fill-ins generated by a new eliminated node, if needed, will be computed by the elimination sequence, or need be computed by the triangulation itself.

An elimination sequence provides fill-ins to its triangulation if and only if it has the ability to compute them and it has been asked to do so (by method askFillIns)

Implements gum::EliminationSequenceStrategy.

Definition at line 210 of file defaultEliminationSequenceStrategy.cpp.

210{ return _provide_fill_ins_; }

References _provide_fill_ins_.

◆ providesGraphUpdate()

bool gum::DefaultEliminationSequenceStrategy::providesGraphUpdate ( ) const

finalvirtual

indicates whether the elimination sequence updates by itself the graph after a node has been eliminated

Some algorithms have more informations than the triangulation algorithm to update the graph after a node has been eliminated. They can thus exploit these informations to update the graph faster than the triangulation. Hence the latter should delegate this operation to the elimination sequence. This is the case, for instance, for the defaultEliminationSequence, which uses a SimplicialSet that knows that some eliminated nodes do not require any fill-in.

Implements gum::EliminationSequenceStrategy.

Definition at line 214 of file defaultEliminationSequenceStrategy.cpp.

214{ return true; }

◆ setGraph()

bool gum::DefaultEliminationSequenceStrategy::setGraph	(	UndiGraph *	graph,
		const NodeProperty< Size > *	dom_sizes )

finalvirtual

sets a new graph to be triangulated

The elimination sequence algorithm reinitializes its data to start a new triangulation with Graph "graph"

Parameters

graph	the new graph to be triangulated
dom_sizes	the domain sizes of the variables/nodes

Returns: true if the data structures were modified (if the graph or the

Warning: Note that we allow dom_sizes to be defined over nodes/variables that do not belong to graph. These sizes will simply be ignored. However, it is compulsory that all the nodes of graph belong to dom_sizes; the graph is altered during the triangulation.; note that, by aGrUM's rule, the graph and the domain sizes are not copied but only referenced by the elimination sequence algorithm.

Reimplemented from gum::EliminationSequenceStrategy.

Definition at line 144 of file defaultEliminationSequenceStrategy.cpp.

                                                                                              {
    if (UnconstrainedEliminationSequenceStrategy::setGraph(graph, domain_sizes)) {
      _createSimplicialSet_();
      return true;
    }
 
    return false;
  }

References _createSimplicialSet_(), gum::EliminationSequenceStrategy::graph(), and gum::EliminationSequenceStrategy::setGraph().

Referenced by DefaultEliminationSequenceStrategy().

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Member Data Documentation

◆ _log_weights_

NodeProperty< double > gum::DefaultEliminationSequenceStrategy::_log_weights_

private

for each node, the weight of the clique created by the node's elimination

Definition at line 238 of file defaultEliminationSequenceStrategy.h.

Referenced by DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), _createSimplicialSet_(), clear(), and nextNodeToEliminate().

◆ _provide_fill_ins_

bool gum::DefaultEliminationSequenceStrategy::_provide_fill_ins_ {false}

private

indicates whether we compute new fill-ins

Definition at line 250 of file defaultEliminationSequenceStrategy.h.

250{false};

Referenced by DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), _createSimplicialSet_(), askFillIns(), fillIns(), and providesFillIns().

◆ _simplicial_ratio_

double gum::DefaultEliminationSequenceStrategy::_simplicial_ratio_

private

the ratio used by simplicial_set for its quasi-simplicial nodes

Definition at line 244 of file defaultEliminationSequenceStrategy.h.

Referenced by DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), _createSimplicialSet_(), and newFactory().

◆ _simplicial_set_

SimplicialSet* gum::DefaultEliminationSequenceStrategy::_simplicial_set_ {nullptr}

private

the simplicial set used for determining the best nodes to eliminate

Definition at line 241 of file defaultEliminationSequenceStrategy.h.

241{nullptr};

Referenced by DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), ~DefaultEliminationSequenceStrategy(), _createSimplicialSet_(), askFillIns(), clear(), eliminationUpdate(), fillIns(), and nextNodeToEliminate().

◆ _simplicial_threshold_

double gum::DefaultEliminationSequenceStrategy::_simplicial_threshold_

private

the threshold used by simplicial_set to determine small cliques

Definition at line 247 of file defaultEliminationSequenceStrategy.h.

Referenced by DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), DefaultEliminationSequenceStrategy(), _createSimplicialSet_(), and newFactory().

◆ domain_sizes_

const NodeProperty< Size >* gum::EliminationSequenceStrategy::domain_sizes_ {nullptr}

protectedinherited

the domain sizes of the variables/nodes

Definition at line 177 of file eliminationSequenceStrategy.h.

177{nullptr};

Referenced by EliminationSequenceStrategy(), EliminationSequenceStrategy(), clear(), domainSizes(), and setGraph().

◆ graph_

UndiGraph* gum::EliminationSequenceStrategy::graph_ {nullptr}

protectedinherited

the graph to be triangulated

Definition at line 174 of file eliminationSequenceStrategy.h.

174{nullptr};

◆ log_domain_sizes_

NodeProperty< double > gum::EliminationSequenceStrategy::log_domain_sizes_

protectedinherited

the log of the domain sizes of the variables/nodes

Definition at line 180 of file eliminationSequenceStrategy.h.

Referenced by gum::DefaultEliminationSequenceStrategy::DefaultEliminationSequenceStrategy(), gum::DefaultPartialOrderedEliminationSequenceStrategy::DefaultPartialOrderedEliminationSequenceStrategy(), EliminationSequenceStrategy(), EliminationSequenceStrategy(), gum::DefaultEliminationSequenceStrategy::_createSimplicialSet_(), gum::DefaultPartialOrderedEliminationSequenceStrategy::_createSimplicialSet_(), clear(), and setGraph().

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

agrum/base/graphs/algorithms/triangulations/eliminationStrategies/defaultEliminationSequenceStrategy.h
agrum/base/graphs/algorithms/triangulations/eliminationStrategies/defaultEliminationSequenceStrategy.cpp

Public Member Functions

Protected Attributes

Private Member Functions

Static Private Member Functions

Private Attributes

Detailed Description

the nodes that are simplicial (i.e., those that already form a clique

then the nodes that are almost simplicial (i.e., if we remove one of

are eliminated

the quasi simplicial nodes (i.e., the nodes that do not require many

finally, the heuristic proposed by Kjaerulff(90) is used to compute the

Constructor & Destructor Documentation

◆ DefaultEliminationSequenceStrategy() [1/4]

◆ DefaultEliminationSequenceStrategy() [2/4]

◆ DefaultEliminationSequenceStrategy() [3/4]

◆ DefaultEliminationSequenceStrategy() [4/4]

◆ ~DefaultEliminationSequenceStrategy()

Member Function Documentation

◆ _createSimplicialSet_()

◆ _empty_fill_ins_()

◆ askFillIns()

◆ clear()

◆ copyFactory()

◆ domainSizes()

◆ eliminationUpdate()

◆ fillIns()

◆ graph()

◆ newFactory()

◆ nextNodeToEliminate()

◆ providesFillIns()

◆ providesGraphUpdate()

◆ setGraph()

Member Data Documentation

◆ _log_weights_

◆ _provide_fill_ins_

◆ _simplicial_ratio_

◆ _simplicial_set_

◆ _simplicial_threshold_

◆ domain_sizes_

◆ graph_

◆ log_domain_sizes_