Random Latin squares and 2-dimensional expanders

Alexander Lubotzky, Roy Meshulam*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Expander graphs have been playing an important role in combinatorics and computer science over the last four decades. In recent years a theory of high dimensional expanders is emerging, but as of now all known examples of expanders (random and explicit) have unbounded degrees. The question of existence of bounded degree high dimensional expanders was raised by Gromov and by Dotterrer and Kahle. In this paper we present a new model, based on Latin squares, of 2-dimensional complexes of bounded edge degrees that are expanders with probability tending to 1.

Original languageEnglish
Pages (from-to)743-760
Number of pages18
JournalAdvances in Mathematics
Volume272
DOIs
StatePublished - 6 Feb 2015

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Inc.

Keywords

  • 55U10
  • 68Q87
  • Expansion
  • Random complexes
  • Simplicial complexes

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