org.jgrapht.alg.interfaces

Interface MinimumWeightedVertexCoverAlgorithm<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Superinterfaces:

MinimumVertexCoverAlgorithm<V,E>

All Known Implementing Classes:

BarYehudaEvenTwoApproxVCImpl, ClarksonTwoApproxVCImpl, GreedyVCImpl, RecursiveExactVCImpl

public interface MinimumWeightedVertexCoverAlgorithm<V,E>
extends MinimumVertexCoverAlgorithm<V,E>

Computes a weighted vertex cover in an undirected graph. A vertex cover of a graph is a set of vertices such that each edge of the graph is incident to at least one vertex in the set. A minimum vertex cover is a vertex cover having the smallest possible number of vertices for a given graph. The size of a minimum vertex cover of a graph G is known as the vertex cover number. A vertex cover of minimum weight is a vertex cover where the sum of weights assigned to the individual vertices in the cover has been minimized. The minimum vertex cover problem is a special case of the minimum weighted vertex cover problem where all vertices have equal weight. Consequently, any algorithm designed for the weighted version of the problem can also solve instances of the unweighted version.

Nested Class Summary

Nested classes/interfaces inherited from interface org.jgrapht.alg.interfaces.MinimumVertexCoverAlgorithm

MinimumVertexCoverAlgorithm.VertexCover<V>, MinimumVertexCoverAlgorithm.VertexCoverImpl<V>

Method Summary

Modifier and Type	Method and Description
default MinimumVertexCoverAlgorithm.VertexCover<V>	getVertexCover(UndirectedGraph<V,E> graph) Computes a vertex cover; all vertices are considered to have equal weight.
MinimumVertexCoverAlgorithm.VertexCover<V>	getVertexCover(UndirectedGraph<V,E> graph, Map<V,Double> vertexWeightMap) Computes a vertex cover; the weight of each vertex is provided in the in the vertexWeightMap.

Method Detail

getVertexCover

default MinimumVertexCoverAlgorithm.VertexCover<V> getVertexCover(UndirectedGraph<V,E> graph)

Computes a vertex cover; all vertices are considered to have equal weight.

Specified by:

getVertexCover in interface MinimumVertexCoverAlgorithm<V,E>

Parameters:

graph - the graph

Returns:

a vertex cover

getVertexCover

MinimumVertexCoverAlgorithm.VertexCover<V> getVertexCover(UndirectedGraph<V,E> graph,
                                                          Map<V,Double> vertexWeightMap)

Computes a vertex cover; the weight of each vertex is provided in the in the vertexWeightMap.

Parameters:

graph - the input graph

vertexWeightMap - map containing non-negative weights for each vertex

Returns:

a vertex cover