Seminar in Real & Complex Geometry
Geometry & Dynamics Seminar
Wednesday, 06.11.2013, 14:1015:30,
Schreiber
building, room 209
Stepan Orevkov,
Steklov Institute
Algorithmic recognition of quasipositive braids of algebraic length two
Abstract
A braid is called quasipositive if it is a product of standard generators
of the braid group. We give an algorithm which decide if a given
braid is a product of two conjugates of standard generators.
The algorithm is based on the Garside theory which was developped for a
solution
of the conjugacy problem in the braid groups. We also give in the talk
a short introduction to this theory.
