Universal coacting Poisson Hopf algebras

Abstract

We introduce the analogue of Manin's universal coacting (bialgebra) Hopf algebra for Poisson algebras. First, for two given Poisson algebras $P$ and $U$, where $U$ is finite dimensional, we construct a Poisson algebra $\mathcal{B}(P,U)$ together with a Poisson algebra homomorphism ${\psi }_{\mathcal{B}(P,U)}:P\to U\otimes \mathcal{B}(P,U)$ satisfying a suitable universal property. $\mathcal{B}(P,U)$ is shown to admit a Poisson bialgebra structure for any pair of Poisson algebra homomorphisms subject to certain compatibility conditions. If $P=U$ is a finite dimensional Poisson algebra then $\mathcal{B}(P)=\mathcal{B}(P,P)$ admits a unique Poisson bialgebra structure such that ${\psi }_{\mathcal{B}(P)}$ becomes a Poisson comodule algebra and, moreover, the pair $(\mathcal{B}(P),{\psi }_{\mathcal{B}(P)})$ is the universal coacting bialgebra of $P$. The universal coacting Poisson Hopf algebra $\mathcal{H}(P)$ on $P$ is constructed as the initial object in the category of Poisson comodule algebra structures on $P$ by using the free Poisson Hopf algebra on a Poisson bialgebra (\cite{A1}).

To appear in Manuscripta Math. DOI: 10.1007/s00229-020-01207-0

References in corpus (1)

• Comodule algebras and integrable systems