100, rue des maths 38610 Gières / GPS : 45.193055, 5.772076 / Directeur : Thierry Gallay

Francisco Kordon

Hochschild cohomology of algebras of differential operators tangent to a hyperplane arrangement
Monday, 19 March, 2018 - 10:30
Résumé : 
An arrangement of hyperplanes is a finite set of hyperplanes in a vector space of finite dimension. Given a hyperplane arrangement A in a vector space V, the Lie algebra of derivations tangent to the arrangement Der A consist of the derivations of S, the coordinate ring of V, that preserve each of the hyperplanes of A. This Lie algebra is a very useful invariant of the arrangement, since it is closely related to the geometry and combinatorics of the arrangement and the topology of its complement. In this talk I will present the associative algebra of differential operators of A, which is the associative algebra generated by Der A and S inside the algebra of endomorphisms of S and the computation of its Hochschild cohomology in some particular cases.

 

Thème de recherche : 
Algèbre et géométries
Salle : 
4
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