Let τ be an invertible skew pairing on (B,H), where B and H are Hopf algebras in a symmetric monoidal category C with (co)equalizers. Assume that H is quasitriangular. Then we obtain a new algebra structure such that B is a Hopf algebra in the braided category HYD and there exists a Hopf algebra isomorphism w : B∞H → B τH in C, where B∞H is a Hopf algebra with (co)algebra structure the smash (c...

The Smash product of a finite dimensional quasi-hereditary algebra graded by a finite group with the group is proved to be a quasihereditary algebra. Some elementary relations between the good modules of the two quasi-hereditary algebras are given.

Let L and H be algebras and coalgebras (but not necessarily bialgebras, and consider two maps R : H ⊗L → L⊗H and W : L⊗H → H ⊗L. We introduce a product K = L W⊲⊳R H , and we give necessary and sufficient conditions for K to be a bialgebra. Our construction generalizes products introduced by Majid [13] and Radford [20]. Also some of the pointed Hopf algebras that were recently constructed by Bea...

A notion of vertex bialgebra and a notion of module nonlocal vertex algebra for a vertex bialgebra are studied and then a smash product construction of nonlocal vertex algebras is presented. For every nonlocal vertex algebra V satisfying a suitable condition, a canonical bialgebra B(V ) is constructed such that primitive elements of B(V ) are essentially pseudo derivations and group-like elemen...