Improved book-embeddings of incomplete hypercubes

  • Authors:
  • Toru Hasunuma

  • Affiliations:
  • Department of Mathematical and Natural Sciences, The University of Tokushima, 1-1 Minamijosanjima, Tokushima 770-8502, Japan

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2009

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Abstract

In this paper, we show that any incomplete hypercube with, at most, 2^n+2^n^-^1+2^n^-^2 vertices can be embedded in n-1 pages for all n=4. For the case n=4, this result improves Fang and Lai's result that any incomplete hypercube with, at most, 2^n+2^n^-^1 vertices can be embedded in n-1 pages for all n=2. Besides this, we show that the result can be further improved when n is large - e.g., any incomplete hypercube with at most 2^n+2^n^-^1+2^n^-^2+2^n^-^7 (respectively, 2^n+2^n^-^1+2^n^-^2+2^n^-^7+2^n^-^2^3^0) vertices can be embedded in n-1 pages for all n=9 (respectively, n=232).