Hamilton cycles in sparse robustly expanding digraphs

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • UNIVERSITY OF AMSTERDAM

Abstract

The notion of robust expansion has played a central role in the solution of several conjectures involving the packing of Hamilton cycles in graphs and directed graphs. These and other results usually rely on the fact that every robustly expanding (di)graph with suitably large minimum degree contains a Hamilton cycle. Previous proofs of this require Szemerédi’s Regularity Lemma and so this fact can only be applied to dense, sufficiently large robust expanders. We give a proof that does not use the Regularity Lemma and, indeed, we can apply our result to sparser robustly expanding digraphs.

Details

Original languageEnglish
Article number#P3.44
JournalElectronic Journal of Combinatorics
Volume25
Issue number3
Publication statusPublished - 7 Sep 2018

Keywords

  • Digraph, Hamilton cycles, Robust expanders