A ] 7 J un 2 00 4 Non-commutative Hopf algebra of formal diffeomorphisms

Abstract

The subject of this paper are two Hopf algebras which are the non-commutative analogues of two different groups of formal power series. The first group is the set of invertible series with the group law being multiplication of series, while the second group is the set of formal diffeomorphisms with the group law being composition of series. The motivation… (More)

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