Improved lower bound on the Shannon capa
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Aleksander Vesel; Janez Ε½erovnik
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Article
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2002
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Elsevier Science
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English
β 169 KB
An independent set with 108 vertices in the strong product of four 7-cycles (C 7 C 7 C 7 C 7 ) is given. This improves the best known lower bound for the Shannon capacity of the graph C 7 which is the zero-error capacity of the corresponding noisy channel. The search was done by a computer program u