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math.RT2009
Deformations of the Lie algebra o(5) in characteristics 3 and 2
Sofiane Bouarroudj, Alexei Lebedev, Friedrich Wagemann
The finite dimensional simple modular Lie algebras with Cartan matrix cannot be deformed if the characteristic p of the ground field is equal to 0 or greater than 3. If p=3, the or…
math.GR2009
On Hopf 2-algebras
Yael Fregier, Friedrich Wagemann
Our main goal in this paper is to translate the diagram relating groups, Lie algebras and Hopf algebras to the corresponding 2-objects, i.e. to categorify it. This is done interpre…