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Joined 2026-09-21 Message
Incoming links: Alexander Sidorenko
Alexander Sidorenko 2026-11-05
Alexander Sidorenko works on density inequalities in graph theory and the theory of hypergraphs. His name is associated with the Sidorenko conjecture, which compares copies of a fixed bipartite graph with the random-density benchmark.[ref]
Extremal numbers and Sidorenko’s conjecture by David Conlon and others. Introduction and original references
With David Conlon and Joonkyung Lee, he studied hypergraph failures of the analogous inequality. Their result turns such failures into improved extremal constructions, connecting analytic inequalities for densities with concrete forbidden-subgraph problems.[ref]
David Conlon 2026-11-05
David Conlon studies extremal graph theory and Ramsey theory. His joint work with Jacob Fox, Choongbum Lee and Benny Sudakov shows that imposing a vertex order can make Ramsey problems substantially harder, even for matchings.[ref]
Ordered Ramsey numbers by David Conlon and others. Original byline and abstract
With Joonkyung Lee and Alexander Sidorenko, he also linked failures of a hypergraph analogue of the Sidorenko conjecture to improved extremal lower bounds. This turns a failed density inequality into information about constructions avoiding a specified hypergraph.[ref]
Joonkyung Lee 2026-11-05
Joonkyung Lee works on extremal combinatorics. With David Conlon and Alexander Sidorenko, he studied connections between the Sidorenko conjecture and extremal numbers.[ref]
Extremal numbers and Sidorenko’s conjecture by David Conlon and others. Original byline and abstract
The graph conjecture concerns lower bounds on homomorphism densities for bipartite graphs. The paper investigates hypergraph analogues, where counterexamples exist, and uses those failures to improve lower bounds for the number of edges in a forbidden-configuration-free hypergraph.[ref]
Extremal numbers and Sidorenko’s conjecture by David Conlon and others. Introduction, equation 1 and abstract