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SUMMARY:Eigencones and Levi movability - Ressayre\, N (Universit Montpelli
 er 2)
DTSTART:20131015T103000Z
DTEND:20131015T113000Z
UID:TALK48150@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:\nLet g λμν   denote the Kronecker coefficient. It is a mul
 tiplicity in the decomposition of the tensor product of two irreducible re
 presentations of the symmeric group. The set of triples (λ\,μ\,ν)  of b
 ounded length such that g λμν   is nonzero generate a closed convex pol
 yhedral cone. In this talk\, we will give a description of these cones and
  more generaly of branching cones.\n \nSome branching cones have an interp
 retation in terms of eigenvalues of Hermitian matrices known as the addive
  Horn problem. We will also give an answer of the so called multiplicative
  Horn problem. \n\n\n
LOCATION:Seminar Room 1\, Newton Institute
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