Representation theory in complex rank, II
Abstract
This paper is a sequel to arXiv:1401.6321. We define and study representation categories based on Deligne categories Rep(GLt), Rep(Ot), Rep(Sp2t), where t is any (non-integer) complex number. Namely, we define complex rank analogs of the parabolic category O and the representation categories of real reductive Lie groups and supergroups, affine Lie algebras, and Yangians. We develop a framework and language for studying these categories, prove basic results about them, and outline a number of directions of further research.
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