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math.QA2012
Integrals and crossed products over weak Hopf algebras
N. Alonso Álvarez, J. M. Fernández Vilaboa, R. González Rodríguez
In this paper we present the general theory of cleft extensions for a cocommutative weak Hopf algebra . For a weak left -module algebra we obtain a bijective correspondence b…
math.QA2009★ 4 cited
Weak Crossed Biproducts and Weak Projections
J. M. Fernández Vilaboa, R. González Rodríguez, A. B. Rodríguez Raposo
We present the universal theory of weak crossed biproducts, and we prove that every weak projection of weak bialgebras induces an example of this crossed structure. As an example,…