Noncommutative Geometry

Title: Manin's products and Deligne's conjecture
Speaker: Professor Bruno Vallette
Speaker Info: University of Nice
Brief Description:
Special Note:

In this talk, we will give a conceptual definition of Manin products in any category endowed with two coherent monoidal products. This construction can be applied to associative algebras, nonsymmetric operads, operads, colored operads, and prop(erad)s presented by generators and relations. These two products, called black and white, are dual to each other under Koszul duality functor. They allow us to define natural operations on the chain complex defining cohomology theories of algebras (deformation complex like Hochschild cohomology of an associative algebra). With these operations, we are able to prove that Deligne's conjecture holds for a general class of operads and is not specific to the case of associative algebras. Finally, we prove generalized versions of a few conjectures raised by M. Aguiar and J.-L. Loday related to the Koszul property of operads defined by black products. These operads provide infinitely many examples for this generalized Deligne's conjecture.
Date: Tuesday, May 08, 2007
Time: 3-4:30PM
Where: Lunt 102
Contact Person: Vasiliy Dolgushev
Contact email: vald@math.northwestern.edu
Contact Phone: 847-467-1298
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