min_weighted_vertex_cover

min_weighted_vertex_cover(graph, weight=None)

2-OPT Local Ratio for Minimum Weighted Vertex Cover

Find an approximate minimum weighted vertex cover of a graph.

Parameters :

graph : NetworkX graph

Undirected graph

weight : None or string, optional (default = None)

If None, every edge has weight/distance/cost 1. If a string, use this edge attribute as the edge weight. Any edge attribute not present defaults to 1.

Returns :

min_weighted_cover : set

Returns a set of vertices whose weight sum is no more than 2 * OPT.

References

[R108]

Bar-Yehuda, R., & Even, S. (1985). A local-ratio theorem for approximating the weighted vertex cover problem. Annals of Discrete Mathematics, 25, 27–46 http://www.cs.technion.ac.il/~reuven/PDF/vc_lr.pdf