Ribbon Structure in Symmetric Pre-monoidal Categories
arXiv:math/0501400
Abstract
Let U(g) denote the universal enveloping algebra of a Lie algebra g. We show the existence of a ribbon algebra in a particular deformation of U(g) which leads to a symmetric pre-monoidal category of U(g)-modules.
To appear in the Proceedings of XXV ICGTMP (Group 25) (Institute of Physics, London.)