"Geometry and Analysis on Groups" Research Seminar

Time: 2016.06.29, time TBA
Location: TBA
Title: "Spectral gaps, warped cones and the coarse Baum-Connes conjecture."
Speaker: Piotr Nowak (IMPAN/Uniwersytet Warszawski)
Abstract: The coarse Baum-Connes conjecture is a large-scale geometric version of the Baum-Connes conjecture. Certain expanders are known to be bounded geometry counterexamples to the conjecture. I will discuss the construction of a warped cone over a group action and why such warped cones over actions with spectral gaps should also be counterexamples to the coarse Baum-Connes conjecture. Joint work with Cornelia Drutu.