Normal subgroups of the braid groups and the Dehornoy ordering
- Date: 01/17/2007
Lecturer(s):
Adam Clay (University of British Columbia)
Location:
University of British Columbia
Topic:
The braid groups admit a left-ordering, known as the Dehornoy ordering,
which has come up under many guises in recent years. I will show that
normal subgroups interact with the Dehornoy ordering in such a way that
'nearly all' normal subgroups of the braid groups are densely ordered
with respect to this ordering. In particular, some popular normal
subgroups--such as the kernels of the Burau representations--can be
easily analyzed. This is joint work with Dale Rolfsen.
Other Information:
Algebraic Topology Seminar 2007
Sponsor:
