A characterization of -free, diameter-2-critical graphs
β Scribed by Haynes, Teresa W.; Henning, Michael A.
- Book ID
- 122268143
- Publisher
- Elsevier Science
- Year
- 2014
- Tongue
- English
- Weight
- 367 KB
- Volume
- 169
- Category
- Article
- ISSN
- 0166-218X
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π SIMILAR VOLUMES
A graph is diameter 2-critical if the graph has diameter 2 and the deletion of any edge increases its diameter. We prove that if G is diameter 2-critical graph on n vertices and e edges, then (i) e ~< [14n2 ] for n <~ 24, and (ii) e < !4n2 + (n 2 -16.2 n + 56)/320 (<0.2532 n2), for n/> 25.
## Abstract We prove that the minimum number of edges in a vertexβdiameterβ2βcritical graph on __n__ββ₯β23 vertices is (5__n__βββ17)/2 if __n__ is odd, and is (5__n__/2)βββ7 if __n__ is even. Β© 2005 Wiley Periodicals, Inc. J Graph Theory