Abstract
The Homfly invariant of a link is a two variable
polynomial with specializations corresponding to the
so-called SU(N) quantum invariant.
We will present the corresponding skein theory,
and construct a semisimple ribbon category out of it.
The key point here is the structure of Hecke algebras.
This lecture is part of the course "TQFT and Knot theory".
Contact person:Jørgen Ellegaard Andersen.