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Exponential Families of Non-Isomorphic Triangulations of Complete Graphs

Published: 01 March 2000 Publication History

Abstract

We prove that the number of non-isomorphic face 2-colourable triangulations of the complete graph Kn in an orientable surface is at least 2n2/54 O(n) for n congruent to 7 or 19 modulo 36, and is at least 22n2/81 O(n) for n congruent to 19 or 55 modulo 108.

References

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M.J. Grannell, T.S. Griggs, J. ¿irá¿, Face 2-colourable triangular embeddings of complete graphs, J. Combin. Theory Ser. B, 74 (1998) 8-19.
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M.J. Grannell, T.S. Griggs, J. ¿irá¿, Surface embeddings of Steiner triple systems, J. Combin. Des., 6 (1998) 325-336.
[3]
V. P. Korzhik, and, H. J. Voss, On the number of non-isomorphic orientable regular embeddings of complete graphs, submitted for publication.
[4]
S. Lawrencenko, S. Negami, A.T. White, Three nonisomorphic triangulations of an orientable surface with the same complete graph, Discrete Math., 135 (1994) 367-369.
[5]
G. Ringel, Springer, 1974.
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A.T. White, Block designs and graph imbeddings, J. Combin. Theory Ser. B, 25 (1978) 166-183.
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R.M. Wilson, Nonisomorphic Steiner triple systems, Math. Z., 135 (1974) 303-313.
[8]
J.W.T. Youngs, The mystery of the Heawood conjecture, in: Graph Theory and its Applications, Academic Press, 1970, pp. 17-50.

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  1. Exponential Families of Non-Isomorphic Triangulations of Complete Graphs

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      Published In

      cover image Journal of Combinatorial Theory Series B
      Journal of Combinatorial Theory Series B  Volume 78, Issue 2
      March 2000
      113 pages
      ISSN:0095-8956
      Issue’s Table of Contents

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      Academic Press, Inc.

      United States

      Publication History

      Published: 01 March 2000

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