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Department of Mathematics Seminars and Talks

 
Seminar

Combinatorics Seminar

Talk Information
Title
On the rational exponents conjecture
Start date and time
10:00 on Tuesday October 20, 2026
Duration in minutes
90 (until 11:30 on Tuesday October 20, 2026)
Room
Virtual
Streaming password
329234
External video link
Abstract

The rational exponents conjecture of Erdos and Simonovits states that for every rational $r\in [1,2]$, there exists a graph $H$ such that $\mathrm{ex}(n,H)=\Theta(n^r)$. In this talk, I will survey the progress made over the past decade in understanding the extremal number of bipartite graphs and explain how AI built on these advances to complete the proof of the conjecture.

Speaker Information
Full Name
Oliver Janzer
Institution
École Polytechnique Fédérale de Lausanne
Institution URL