[Binghamton Geometry/Topology Seminar] geometry-topology seminar

[Ross Geoghegan]

                   BINGHAMTON GEOMETRY/TOPOLOGY SEMINAR


   Date: Thursday February 10, 2005 

   Time:  2.50 pm

   Place: Library North 2205 followed by coffee/tea in the Anderson
          Reading Room.

   Speaker: John Meier (Lafayette College)

   Title:  The homology of the group of loops 

ABSTRACT: 

The group $P\Sigma_n$ is something like a higher dimensional version
of the pure braid group. Just as the pure braid group can be thought of
as the group of motions of n points in the plane, $P\Sigma_n$ is the
group of motions of n unknotted, unlinked circles in 3-space. I will
present a computation of the homology groups of $P\Sigma_n$. The bad
news is this is a spectral sequence computation. The good news is all
the hard work boils down to the combinatorics of planted forests. (Joint
with Craig Jensen and Jon McCammond)

NOTE:  The seminar has a webpage where the semester's program is listed:

http://math.binghamton.edu/MATH/dept/topsem/index.html

It can also be linked from the Department's Home Page.
_____________________
IF YOU WANT TO BE REMOVED FROM THIS EMAIL LIST WRITE
ross at math.binghamton.edu