Seminar: “A Survey on Constructing Free Actions on Products of Spheres,” Prof. Dr. Ergün Yalçın, SA-141, 1:40PM April 9 (EN)

“A survey on constructing free actions on products of spheres”

by Ergün Yalçın (Bilkent)

Date: Monday, April 9, 2018
Time: 13:40
Place: Mathematics Seminar Room, SA – 141

Abstract: I will give a survey of problems and recent results on constructing free actions on products of spheres. The rank conjecture, due to Benson and Carlson, states that a finite group G acts freely and cellularly on a finite complex X homotopy equivalent to a product of k spheres if and only if the rank of G is less than or equal to k. This conjecture is known to be true for k=1 by classical Smith theory and by a theorem of Swan. For k=2 it is proved by Adem and Smith, and Jackson that if a rank two finite group does not involve the group Qd(p) for any odd prime p, then it acts freely and cellularly on a finite complex X homotopy equivalent to a product of two spheres. I will discuss what is known for the remaining case G=Qd(p). The most recent results that I will present are joint work with Cihan Okay. I will also mention some earlier work joint with Ozgun Unlu and with Ian Hambleton.

http://www.fen.bilkent.edu.tr/~cvmath/tr/seminars/2018Spring/09042018.pdf

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