Abstract
The Seifert surface is a well-known and very useful tool in link theory. For
instance, it permits to study the Alexander invariants, the Conway polynomial,
and the signature of an oriented link. In this talk, we shall introduce
'generalized Seifert surfaces' for colored links. They provide a geometric
interpretation of the multivariable Alexander invariants and the Conway
potential function. They also make it possible to define a multivariable
signature that generalizes the Levine-Tristarm signature.
Contact person:Jørgen Ellegaard Andersen.