{ "id": "1910.02538", "version": "v1", "published": "2019-10-06T21:50:10.000Z", "updated": "2019-10-06T21:50:10.000Z", "title": "Upper Triangularity for Unipotent Representations", "authors": [ "Lucas Mason-Brown" ], "categories": [ "math.RT" ], "abstract": "Suppose $G$ is a real reductive group. The determination of the irreducible unitary representations of $G$ is one of the major unsolved problem in representation theory. There is evidence to suggest that every irreducible unitary representation of $G$ can be constructed through a sequence of well-understood operations from a finite set of building blocks, called the unipotent representations. These representations are `attached' (in a certain mysterious sense) to the nilpotent orbits of $G$ on the dual space of its Lie algebra. Inside this finite set is a still smaller set, consisting of the unipotent representations attached to non-induced nilpotent orbits. In this paper, we prove that in many cases this smaller set generates (through a suitable kind of induction) all unipotent representations.", "revisions": [ { "version": "v1", "updated": "2019-10-06T21:50:10.000Z" } ], "analyses": { "subjects": [ "22E47" ], "keywords": [ "unipotent representations", "upper triangularity", "irreducible unitary representation", "finite set", "smaller set generates" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }