The directed genus of the de Bruijn graph

被引:3
|
作者
Hales, Alfred W. [1 ]
Hartsfield, Nora [2 ]
机构
[1] Ctr Commun Res, San Diego, CA 92121 USA
[2] Western Washington Univ, Dept Math, Bellingham, WA 98225 USA
关键词
Directed genus; de Bruijn graph; Directed embeddings; de Bruijn sequence invariant;
D O I
10.1016/j.disc.2007.11.003
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Define the directed genus, Gamma(G), of an Eulerian digraph G to be the minimum value of p for which G has a 2-cell embedding in the orientable surface of genus p so that every face of the embedding is bounded by a directed circuit in G. The directed genus of the de Bruijn graph D-n is shown to be Gamma(D-n) = 2(n-1) + 1 - 1/2(n + 2) Sigma(d vertical bar n+2) phi(d)2(n+2/d). (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:5259 / 5263
页数:5
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