3 articles
Drinfeld double
The Drinfeld double, also called the quantum double, is a Hopf algebra built from a Hopf algebra and its dual, introduced by Vladimir Drinfeld in 1986.
Group ring
A group ring R[G] is a ring of formal finite sums of group elements with coefficients in a ring R; when R is a field it is a group algebra.
Hopf algebra
A Hopf algebra is an algebraic structure that is both an algebra and a coalgebra with a compatible antipode map, generalizing groups and Lie algebras and underlying the theory of quantum groups.