title: Plethystic Hopf algebras.
abstract: The notion of a plethystic algebra associated with a Hopf algebra endowed with a suitable bilinear form is defined. A special case is the Hopf algebra of symmetric functions.
authors.affiliation: Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: G C
authors.initials: GC
authors.lastname: Rota
authors.forename: J A
authors.initials: JA
authors.lastname: Stein