109 citations · 546 across the 60 of their papers we have counts for
3 papers · 1 filter
Nuclear Group Algebras for Finitely Generated Groups
Michel Cahen, Simone Gutt, Stefan Waldmann
We study completions of the group algebra of a finitely generated group and relate nuclearity of such a completion to growth properties of the group. This extends previous work of…
A Universal Construction of Universal Deformation Formulas, Drinfel'd Twists and their Positivity
Chiara Esposito, Jonas Schnitzer, Stefan Waldmann
In this paper we provide an explicit construction of star products on U(g)-module algebras by using the Fedosov approach. This construction allows us to give a constructive proof t…
Obstructions for Twist Star Products
Pierre Bieliavsky, Chiara Esposito, Stefan Waldmann +1
In this short note we point out that not every star product is induced by a Drinfel'd twist by showing that not every Poisson structure is induced by a classical -matrix. Exampl…