SMS scnews item created by Alex Casella at Mon 1 Aug 2016 0946
Type: Seminar
Distribution: World
Expiry: 31 Oct 2016
Calendar1: 1 Aug 2016 1700-1800
CalLoc1: Carslaw 535A
CalTitle1: MaPSS Seminar
Auth: casella@ (acas5565) in SMS-WASM

MaPSS: Mathematical Postgraduate Seminar Series: Robert Tang -- Wall spaces and CAT(0)-cube complexes

Dear All, 

We are delighted to present the MaPSS Seminar topic of Monday ; please see the abstract

**This Semester the Seminar will always run on Monday, at 5:00pm in 535A** 

Following the talk, there will be pizza on offer.  

Speaker: Robert Tang (Postdoc University of Oklahoma) 

Title: Wall spaces and CAT(0)-cube complexes 

Abstract: A wall space is a set X together with a collection W of "walls" -- partitions
of X into two non-empty subsets.  A simple example is a tree: X is the vertex set, and
each edge naturally determines a wall by separating the tree into two components.  I
will describe a construction due to Sageev which associates to a wall space its dual
cube complex C(X,W).  This dual cube complex admits some nice metrics, and captures many
combinatorial properties of the original wall space geometrically.  I will go through
several examples and, time permitting, some applications to topology and group theory.  

Supervisors, please encourage your students to attend. 

MaPSS Organizers

ball Calendar (ICS file) download, for import into your favourite calendar application
ball UNCLUTTER for printing
ball AUTHENTICATE to mark the scnews item as read
School members may try to .