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math.QA2008
Generic Hopf Galois extensions
Christian Kassel
In previous joint work with Eli Aljadeff we attached a generic Hopf Galois extension A(H,c) to each twisted algebra H(c) obtained from a Hopf algebra H by twisting its product with…
math.QA2008★ 11 cited
The lazy homology of a Hopf algebra
Julien Bichon, Christian Kassel
To any Hopf algebra H we associate two commutative Hopf algebras, which we call the first and second lazy homology Hopf algebras of H. These algebras are related to the lazy cohomo…
math.CO2008★ 16 cited
A palindromization map for the free group
Christian Kassel, Christophe Reutenauer
We define a self-map Pal: F_2 --> F_2 of the free group on two generators a, b, using automorphisms of F_2 that form a group isomorphic to the braid group B_3. The map Pal restrict…