01:12:56
publiée le 11 juin 2026
On actions of braid groups on triangulated categories arising in cluster theory
De Bernhard Keller
De Dhruv Mubayi
Apparaît dans la collection : 2018 - T1 - WS1 - Model theory and combinatorics
I will describe lower bounds (i. e. constructions) for several hypergraph Ramsey problems. These constructions settle old conjectures of Erd˝os–Hajnal on classical Ramsey numbers as well as more recent questions due to Conlon–Fox–Lee–Sudakov and others on generalized Ramsey numbers and the Erdos–Rogers problem. Most of this is joint work with Andrew Suk.