Hebrew University 
 
Amitsur Algebra Seminar
******************************
 
Time: Thursday, Nov. 17, 12:00-13:15
Place: room 209, math building.
 
Speaker: Doron Puder (HUJI)
 
Title: Mineyev and Dicks' proof of the strengthened Hanna Neumann conjecture
 
Abstract:
 
Very recently, Igor Mineyev gave a full proof of the Strengthened Hanna
Neumann Conjecture, solving a more than fifty years old open problem
which has generated a lot of interest and research. Given two f.g.
subgroups H,K of some free group, the (non-strengthened) conjecture
states that the rank of their intersection can be bounded as follows: if
h,k denote the ranks of H,K respectively and s denotes the rank of
their intersection, then
 
                        (s-1) \le (h-1)(k-1)
 
After Mineyev's announcement, Warren Dicks considerably simplified the
proof. In this talk, we shall give a complete proof for this result
following Dicks' simplification.
 
You are cordially invited!
 
 <http://math.huji.ac.il/amitsur.html>
 
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Technion Math Net-2 (TECHMATH2)
Editor: Michael Cwikel   <techm@math.technion.ac.il> 
Announcement from: Gili Schul   <gili.schul@mail.huji.ac.il>