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math.QA2008★ 3 cited
Crossed products and cleft extensions for coquasi-Hopf algebras
Adriana Balan
The notion of crossed product by a coquasi-bialgebra H is introduced and studied. The resulting crossed product is an algebra in the monoidal category of right H-comodules. We give…
math.QA2008
Galois extensions for coquasi-Hopf algebras
Adriana Balan
The notions of Galois and cleft extensions are generalized for coquasi-Hopf algebras. It is shown that such an extension over a coquasi-Hopf algebra is cleft if and only if it is G…