Szemerédi's regularity lemma for matrices and sparse graphs

  • Authors:
  • Alexander Scott

  • Affiliations:
  • Mathematical institute, 24-29 st giles', oxford, ox1 3lb, uk (e-mail: scott@maths.ox.ac.uk)

  • Venue:
  • Combinatorics, Probability and Computing
  • Year:
  • 2011

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Abstract

Szemerédi's Regularity Lemma is an important tool for analysing the structure of dense graphs. There are versions of the Regularity Lemma for sparse graphs, but these only apply when the graph satisfies some local density condition. In this paper, we prove a sparse Regularity Lemma that holds for all graphs. More generally, we give a Regularity Lemma that holds for arbitrary real matrices.