Liu, Hong, Pikhurko, Oleg and Staden, Katherine (2020) The exact minimum number of triangles in graphs with given order and size. Forum of Mathematics, Pi, 8 . e8. doi:10.1017/fmp.2020.7

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Abstract

What is the minimum number of triangles in a graph of given order and size? Motivated by earlier results of Mantel and Turán, the first non-trivial case of this problem was solved by Rademacher in 1941, and the problem was revived by Erdős in 1955; it is now known as the Erdős-Rademacher problem. After attracting much attention, it was solved asymptotically in a major breakthrough by Razborov in 2008. In this paper, we provide an exact solution for all large graphs whose edge density is bounded away from 1, which in this range confirms a conjecture of Lovász and Simonovits from 1975. Furthermore, we give a description of the extremal graphs.

Item Type:	Journal Article
Subjects:	Q Science > QA Mathematics
Divisions:	Faculty of Science > Mathematics
Library of Congress Subject Headings (LCSH):	Graph theory, Triangles
Journal or Publication Title:	Forum of Mathematics, Pi
Publisher:	Cambridge University Press
ISSN:	2050-5086
Official Date:	20 April 2020
Dates:	Date Event 20 April 2020 Published
Date of first compliant deposit:	19 March 2020
Volume:	8
Article Number:	e8
DOI:	10.1017/fmp.2020.7
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access
Related URLs:	Publisher
Open Access Version:	ArXiv

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