A construction of semisimple tensor categories
Friedrich Knop
Abstract
Starting from an abelian category A such that every object has only finitely many subobjects we construct a semisimple tensor category T. We show that T interpolates the categories Rep(Aut(p),K) where p runs through certain projective (pro-)objects of A. The main example is A=finite dimensional Fq-vector spaces. Then T can be considered as the category of representations of GL(n,Fq) where n is not a natural number. This work extends a construction of Deligne for symmetric groups.
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