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Basis number of bounded genus graphs

Combinatorics 2024-10-15 v1 Discrete Mathematics

Abstract

The basis number of a graph GG is the smallest integer kk such that GG admits a basis BB for its cycle space, where each edge of GG belongs to at most kk members of BB. In this note, we show that every non-planar graph that can be embedded on a surface with Euler characteristic 00 has a basis number of exactly 33, proving a conjecture of Schmeichel from 1981. Additionally, we show that any graph embedded on a surface Σ\Sigma (whether orientable or non-orientable) of genus gg has a basis number of O(log2g)O(\log^2 g).

Keywords

Cite

@article{arxiv.2410.10566,
  title  = {Basis number of bounded genus graphs},
  author = {Florian Lehner and Babak Miraftab},
  journal= {arXiv preprint arXiv:2410.10566},
  year   = {2024}
}

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R2 v1 2026-06-28T19:20:42.593Z