ClarksonTwoApproxVCImpl (JGraphT : a free Java graph library)

java.lang.Object
- org.jgrapht.alg.vertexcover.ClarksonTwoApproxVCImpl<V,E>

Type Parameters:

V - the graph vertex type

E - the graph edge type

All Implemented Interfaces:

VertexCoverAlgorithm<V>
```
public class ClarksonTwoApproxVCImpl<V,E>
extends java.lang.Object
implements VertexCoverAlgorithm<V>
```
Implementation of the 2-opt algorithm for a minimum weighted vertex cover by Clarkson, Kenneth L. "A modification of the greedy algorithm for vertex cover." Information Processing Letters 16.1 (1983): 23-25. The solution is guaranteed to be within $2$ times the optimum solution. Runtime: $O(|E|\log |V|)$ Note: this class supports pseudo-graphs

Author:

Joris Kinable

Nested Class Summary
- Nested classes/interfaces inherited from interface org.jgrapht.alg.interfaces.VertexCoverAlgorithm
  VertexCoverAlgorithm.VertexCover<V>, VertexCoverAlgorithm.VertexCoverImpl<V>

Constructor Summary

Constructors
Constructor	Description
`ClarksonTwoApproxVCImpl(Graph<V,E> graph)`	Constructs a new ClarksonTwoApproxVCImpl instance where all vertices have uniform weights.
`ClarksonTwoApproxVCImpl(Graph<V,E> graph, java.util.Map<V,java.lang.Double> vertexWeightMap)`	Constructs a new ClarksonTwoApproxVCImpl instance

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

VertexCoverAlgorithm.VertexCover<V> getVertexCover()
Computes a vertex cover.
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ClarksonTwoApproxVCImpl
```
public ClarksonTwoApproxVCImpl(Graph<V,E> graph)
```
    Constructs a new ClarksonTwoApproxVCImpl instance where all vertices have uniform weights.
    
    Parameters:
    
    graph - input graph
  - ClarksonTwoApproxVCImpl
```
public ClarksonTwoApproxVCImpl(Graph<V,E> graph,
                               java.util.Map<V,java.lang.Double> vertexWeightMap)
```
    Constructs a new ClarksonTwoApproxVCImpl instance
    
    Parameters:
    
    graph - input graph
    
    vertexWeightMap - mapping of vertex weights
- Method Detail
  - getVertexCover
```
public VertexCoverAlgorithm.VertexCover<V> getVertexCover()
```
    Description copied from interface: VertexCoverAlgorithm
    
    Computes a vertex cover.
    
    Specified by:
    
    getVertexCover in interface VertexCoverAlgorithm<V>
    
    Returns:
    
    a vertex cover