We determine, to within a constant factor, the maximum size of a digraph that does not contain a topological complete digraph DK p of order p. Let t 1 ( p) be defined for positive p by where D denotes a digraph. We show that 1 16 p 2 < t 1 ( p) β€ 44 p 2 . We also obtain results for containing topol
An Extremal Result for Subgraphs with Few Edges
β Scribed by S. Brandt
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 427 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0095-8956
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β¦ Synopsis
We prove that whenever the edge number of a graph of order (n \geqslant 517) ensures that it contains every complete graph and every forest with at most (n) vertices and at most (m) edges, then the graph contains every graph with at most (n) vertices and (m) edges if (m<n). The required edge numbers for complete graphs and for forests are derived from Turan's Theorem and from an earlier result of the author. respectively. : 1995 Academic Press, Inc.
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