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

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Clique and Independent Set<br />

<strong>The</strong>se last two reductions provide a chain linking three different problems. <strong>The</strong> hardness of clique is implied by the<br />

hardness of independent set, which is implied by the hardness of vertex cover. By constructing reductions in a chain,<br />

we link together pairs of problems in implications of hardness. Our work is done as soon as all these chains begin<br />

with a single problem that is accepted as hard. Satisfiability is the problem that serves as the first link in this chain.<br />

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

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

file:///E|/BOOK/BOOK3/NODE109.HTM (2 of 2) [19/1/2003 1:29:47]

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