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math.RT2012
Tensor products of unipotent characters of general linear groups over finite fields
Emmanuel Letellier
We study multiplicities of unipotent characters in tensor products of unipotent characters of GL(n,q). We prove that these multiplicities are polynomials in q with non-negative int…
math.RT2012★ 2 cited
Positivity of Kac polynomials and DT-invariants for quivers
Tamas Hausel, Emmanuel Letellier, Fernando Rodriguez-Villegas
We give a cohomological interpretation of both the Kac polynomial and the refined Donaldson-Thomas- invariants of quivers. This interpretation yields a proof of a conjecture of Kac…