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Supersaturated graphs and hypergraphs
Authors:Paul Erd?s  Miklós Simonovits
Institution:(1) Mathematical Institute of the Hungarian Academy of Sciences, Budapest, Hungary
Abstract:We shall consider graphs (hypergraphs) without loops and multiple edges. Let ? be a family of so called prohibited graphs and ex (n, ?) denote the maximum number of edges (hyperedges) a graph (hypergraph) onn vertices can have without containing subgraphs from ?. A graph (hyper-graph) will be called supersaturated if it has more edges than ex (n, ?). IfG hasn vertices and ex (n, ?)+k edges (hyperedges), then it always contains prohibited subgraphs. The basic question investigated here is: At least how many copies ofL ε ? must occur in a graphG n onn vertices with ex (n, ?)+k edges (hyperedges)?
Keywords:05 C 35  05 C 65
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