Connectivity of graphs with given girth pair

Girth pairs were introduced by Harary and Kovacs [Regular graphs with given girth pair, J. Graph Theory 7 (1983) 209-218]. The odd girth (even girth) of a graph is the length of a shortest odd (even) cycle. Let g denote the smaller of the odd and even girths, and let h denote the larger. Then (g,h) is called the girth pair of the graph. In this paper we prove that a graph with girth pair (g,h) such that g is odd and h>=g+3 is even has high (vertex-)connectivity if its diameter is at most h-3. The edge version of all results is also studied.

[1]  Frank Harary,et al.  Regular graphs with given girth pair , 1983, J. Graph Theory.

[2]  Makoto Imase,et al.  Connectivity of Regular Directed Graphs with Small Diameters , 1985, IEEE Transactions on Computers.

[3]  Miguel Angel Fiol,et al.  Maximally connected digraphs , 1989, J. Graph Theory.

[4]  G. Chartrand Graphs and Digraphs, Fourth Edition , 2004 .

[5]  Mehdi Behzad,et al.  Graphs and Digraphs , 1981, The Mathematical Gazette.

[6]  Miguel Angel Fiol,et al.  On the order and size of s-geodetic digraphs with given connectivity , 1997, Discret. Math..

[7]  Claudine Peyrat,et al.  Sufficient conditions for maximally connected dense graphs , 1987, Discret. Math..