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The.Algorithm.Design.Manual.Springer-Verlag.1998

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Vertex Cover<br />

Combinatorica [Ski90] provides (slow) Mathematica implementations of cliques, independent sets, and<br />

vertex covers. See Section for further information on Combinatorica.<br />

Neural-network heuristics for vertex cover and related problems such as clique and vertex coloring have<br />

been implemented in C and Mathematica by Laura Sanchis and Arun Jagota, and are available in the<br />

algorithm repository http://www.cs.sunysb.edu/ algorith.<br />

Notes: Good expositions of the proof that vertex-cover is NP-complete [Kar72] include [CLR90, GJ79,<br />

Man89]. Good expositions on the 2-approximation algorithm include [CLR90]. <strong>The</strong> example that the<br />

greedy algorithm can be as bad as times optimal is due to [Joh74] and is presented in [PS82].<br />

Related Problems: Independent set (see page ), set cover (see page ).<br />

Next: Traveling Salesman Problem Up: Graph Problems: Hard Problems Previous: Independent Set<br />

<strong>Algorithm</strong>s<br />

Mon Jun 2 23:33:50 EDT 1997<br />

file:///E|/BOOK/BOOK4/NODE174.HTM (3 of 3) [19/1/2003 1:31:19]

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