English

On random irregular subgraphs

Combinatorics 2022-07-28 v1 Probability

Abstract

Let GG be a dd-regular graph on nn vertices. Frieze, Gould, Karo\'nski and Pfender began the study of the following random spanning subgraph model H=H(G)H=H(G). Assign independently to each vertex vv of GG a uniform random number x(v)[0,1]x(v) \in [0,1], and an edge (u,v)(u,v) of GG is an edge of HH if and only if x(u)+x(v)1x(u)+x(v) \geq 1. Addressing a problem of Alon and Wei, we prove that if d=o(n/(logn)12)d = o(n/(\log n)^{12}), then with high probability, for each nonnegative integer kdk \leq d, there are (1+o(1))n/(d+1)(1+o(1))n/(d+1) vertices of degree kk in HH.

Keywords

Cite

@article{arxiv.2207.13651,
  title  = {On random irregular subgraphs},
  author = {Jacob Fox and Sammy Luo and Huy Tuan Pham},
  journal= {arXiv preprint arXiv:2207.13651},
  year   = {2022}
}

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18 pages