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math.QA2014★ 2 cited
Racks, Leibniz algebras and Yetter-Drinfel'd modules
Ulrich Kraehmer, Friedrich Wagemann
A Hopf algebra object in Loday and Pirashvili's category of linear maps entails an ordinary Hopf algebra and a Yetter-Drinfel'd module. We equip the latter with a structure of a br…
math.QA2010★ 5 cited
A residue formula for the fundamental Hochschild class of the Podles sphere
Ulrich Kraehmer, Elmar Wagner
The fundamental Hochschild cohomology class of the standard Podles quantum sphere is expressed in terms of the spectral triple of Dabrowski and Sitarz by means of a residue formula…