Handlebody-knot invariants derived from unimodular Hopf algebras
arXiv:1307.5632
Abstract
A handlebody-knot is a handlebody embedded in the 3-sphere. We establish a uniform method to construct invariants for handlebody-links. We introduce the category of handlebody-tangles and present it by generators and relations. The result tells us that every functor on that gives rise to invariants is derived from what we call a quantum-commutative quantum-symmetric algebra in the target category. The example of such algebras of our main concern is finite-dimensional unimodular Hopf algebras. We investigate how those Hopf algebras give rise to handlebody-knot invariants.
arXiv comment25 Pages