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independent set and independence number (Definition)

A set of vertices in a graph $ G$ is called an independent set if there are no edges between the vertices.

The independence number of a graph $ G$, usually denoted by $ \alpha(G)$, is the size of a maximal independent set in $ G$. $ \alpha(G) \geq \nu$ means that there are $ \nu$ vertices with no edges between them.

An independent set is sometimes called a stable set or an anticlique.



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"independent set and independence number" is owned by rspuzio. [ full author list (2) | owner history (1) ]
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See Also: clique

Other names:  stable set, anticlique
Also defines:  independent set, independence number
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Cross-references: size, edges, graph, vertices
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This is version 3 of independent set and independence number, born on 2004-07-27, modified 2006-11-10.
Object id is 6038, canonical name is IndependentSetAndIndependenceNumber.
Accessed 4561 times total.

Classification:
AMS MSC05C69 (Combinatorics :: Graph theory :: Dominating sets, independent sets, cliques)

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