Gabor Elek (Renyi, Lancaster)
Title: The Følner Tiling Problem
Time: Wednesday, 10.12.2025, 14:00.
Place: ELTE, D3-211.
Abstract: This talk aims to argue that the Følner Tiling Problem—whether the Borel graph arising from the action of a finitely generated amenable group can be tiled by Følner sets of uniformly bounded size—stands as a problem of comparable significance to the classical question of whether amenability implies hyperfiniteness. I will explain the purely combinatorial, the Borel measurable and the topological versions of the problem and their variants. Joint work with Ádám Timár.