English

Hadwiger numbers of self-complementary graphs

Combinatorics 2018-04-13 v2

Abstract

The Hadwiger number of a graph GG, denoted by h(G)h(G), is the order of the largest complete minor of GG. A graph is said to be self-complementary if it is isomorphic to its complement. We prove that for all n0,1(mod 4)n\equiv 0,1 (\text{mod 4}) and for all n+12h3n5 \lfloor \dfrac{n+1}{2} \rfloor \le h \le \lfloor \dfrac{3n}{5}\rfloor , there exists a self-complementary graph GG with nn vertices whose Hadwiger number is hh.

Keywords

Cite

@article{arxiv.1802.03000,
  title  = {Hadwiger numbers of self-complementary graphs},
  author = {Andrei Pavelescu and Elena Pavelescu},
  journal= {arXiv preprint arXiv:1802.03000},
  year   = {2018}
}

Comments

6 pages, 4 figures, 1 table

R2 v1 2026-06-23T00:16:18.748Z