"Graphs with a Small Number of Distinct Induced Subgraphs" by Noga Alon and Béla Bollobás
 

Graphs with a Small Number of Distinct Induced Subgraphs

Abstract

Let G be a graph on n vertices. We show that if the total number of isomorphism types of induced subgraphs of G is at most εn2, where ε < 10−21, then either G or its complement contain an independent set on at least (1 - 4ε)n vertices. This settles a problem of Erdõs and Hajnal. © 1989, Elsevier Inc.

Publication Title

Annals of Discrete Mathematics

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