Sweedler cohomology

General Introduction
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Search results
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Online References
arXiv:1206.3850 Cohomology of algebras over weak Hopf algebras from arXiv Front: math.CT by J. N. Alonso Alvarez, J. M. Fernandez Vilaboa, R. Gonzalez Rodriguez In this paper we present the Sweedler cohomology for a cocommutative weak Hopf algebra H. We show that the second cohomology group classifies completely the weak crossed products, with a common preunit, of H with a commutative left Hmodule algebra A.
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Paper References
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Definition
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Properties
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Standard theorems
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Open Problems
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Connections to Number Theory
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Computations and Examples
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History and Applications
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Some Research Articles
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Other Information
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