nLab
ribbon category

Definition

A ribbon category (also called a tortile category) is a braided pivotal category, or equivalently a balanced autonomous category, which satisfies θ *=θ\theta^* = \theta, where θ\theta is the twist. This is a kind of category with duals.

Revised on June 2, 2010 21:35:21 by Mike Shulman (128.135.72.152)