Bialgebra and Hopf algebra structures on free Rota-Baxter algebras

Research paper by Xing Gao, Li Guo, Tianjie Zhang

Indexed on: 11 Apr '16Published on: 11 Apr '16Published in: Mathematics - Rings and Algebras


In this paper, we obtain a canonical factorization of basis elements in free Rota-Baxter algebras built on bracketed words. This canonical factorization is applied to give a coalgebra structure on the free Rota-Baxter algebras. Together with the Rota-Baxter algebra multiplication, this coproduct gives a bialgebra structure on the free Rota-Baxter algebra of rooted forests. When the weight of the Rota-Baxter algebra is zero, we further obtain a Hopf algebra structure.