Séminaires : Séminaire de Topologie

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In this talk I will present some computations of Ext in the category of polynomial outer functors on free groups. Objects of this category naturally appear in connection to some geometric constructions, and some of these objects provide families of highly non-trivial representations of the groups of outer automorphisms of free groups. After briefly introducing this category and the relevant objects, I will describe a collection of spectral sequences and explain how to derive some of my computations.