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Cohomologie des foncteurs polynomiaux sur les groupes libres

Published 2 Sep 2014 in math.KT, math.AT, math.CT, and math.RA | (1409.0629v1)

Abstract: We show that extension groups between two polynomial functors on free groups are the same in the category of all functors and in a subcategory of polynomial functors of bounded degree. We give some applications. ---- On montre que les groupes d'extensions entre foncteurs polynomiaux sur les groupes libres sont les m^emes dans la cat\'egorie de tous les foncteurs et dans une sous-cat\'egorie de foncteurs polynomiaux de degr\'e born\'e. On donne quelques applications.

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