# Upcoming seminars

 Upcoming Seminars Wed07/29/2015(in 2 days)2:00pm Defense: DissertationTitle to be announcedLuca Bonomi, Emory UniversityContact: Luca Bonomi, lbonomi@emory.eduVenue: Mathematics and Science Center, Room W301Download printable flyer (PDF, 27.2 kB)Hide abstractTBA Mon09/14/2015(in 49 days)4:00pm Colloquium: DepartmentTiling with Arbitrary TilesImre Leader, The University of CambridgeContact: Dwight Duffus, Dwight@mathcs.emory.eduVenue: Mathematics and Science Center, Room W301Download printable flyer (PDF, 47.4 kB)Hide abstractA {\it tile} is a finite subset $T$ of $\mathbb{Z}^n$. It may or may not tile $\mathbb{Z}^n$, in the sense of $\mathbb{Z}^n$ having a partition into copies of $T$. However, Chalcraft conjectured that every $T$A does tile $\mathbb{Z}^d$ for some $d$. In this talk, we will discuss some examples, and also a proof of the conjecture, recently obtained in joint work with Vytautas Gruslys and Ta Sheng Tan. Tue09/15/2015(in 50 days)4:00pm Colloquium: DepartmentOn Turan Problems for Weakly Quasirandom 3-uniform HypergraphsChristian Reiher, University HamburgContact: Vojtech Rodl, Rodl@mathcs.emory.eduVenue: Mathematics and Science Center, Room W301Download printable flyer (PDF, 40.1 kB)Hide abstractIn recent work, we found a new proof of a conjecture due to Erdös and Sós stating that large weakly quasirandom 3-uniform hypergraphs with density greater than 1/4 contain four vertices spanning at least three hyperedges. This was proved earlier by Glebov, Kral, and Volec using flag algebras and computers. The new proof is based on the hypergraph regularity method and gave rise to further developments some of which are surveyed in this talk. This is joint work with Vojtech Rodl and Mathias Schacht.