English

The Gyori-Lovasz theorem

Combinatorics 2016-06-24 v2

Abstract

Gyori and Lovasz independently proved the following beautiful theorem. Let k2k\ge2 be an integer, let GG be a kk-connected graph on nn vertices, let v1,v2,,vkv_1,v_2,\ldots,v_k be distinct vertices of GG and let n1,n2,,nkn_1,n_2,\ldots,n_k be positive integers with n1+n2++nk=nn_1+n_2+\cdots+n_k=n. Then GG has disjoint connected subgraphs G1,G2,,GkG_1,G_2,\ldots,G_k such that for i=1,2,,ki=1,2,\ldots,k the graph GiG_i has nin_i vertices and viV(Gi)v_i\in V(G_i). We give a self-contained exposition of Gyori's proof.

Keywords

Cite

@article{arxiv.1605.01474,
  title  = {The Gyori-Lovasz theorem},
  author = {Alexander Hoyer and Robin Thomas},
  journal= {arXiv preprint arXiv:1605.01474},
  year   = {2016}
}

Comments

4 pages, 1 figure. Corrected spelling of the first author's name

R2 v1 2026-06-22T13:53:39.438Z