Esther Galina

  1. Kirillov's conjecture and $\CaD$-modules.

    Authors: Esther Galina, Yves Laurent
    Subjects: Representation Theory
    Abstract

    In the theory of Lie groups, the irreducibility of a unitary representation
    is not preserved in general by restriction to a subgroup. Kirillov's conjecture
    says that it is preserved for the groups Gl(n,R) or Gl(n,C) when the subgroup
    is the subgroup of matrices leaving invariant a non zero vector. This
    conjecture was proved by Barush using a detailed study of nilpotent orbits. In
    fact, it is not difficult to see that the conjecture is equivalent to the fact
    that some system of partial differential equations has no singular
    distributions as solutions.

  2. Kirillov's conjecture and $\CaD$-modules.

    Authors: Esther Galina, Yves Laurent
    Subjects: Representation Theory
    Abstract

    In the theory of Lie groups, the irreducibility of a unitary representation
    is not preserved in general by restriction to a subgroup. Kirillov's conjecture
    says that it is preserved for the groups Gl(n,R) or Gl(n,C) when the subgroup
    is the subgroup of matrices leaving invariant a non zero vector. This
    conjecture was proved by Barush using a detailed study of nilpotent orbits. In
    fact, it is not difficult to see that the conjecture is equivalent to the fact
    that some system of partial differential equations has no singular
    distributions as solutions.

  3. Parametrization of representations of braid groups.

    Authors: Claudia Maria Egea, Esther Galina
    Subjects: Representation Theory
    Abstract

    We give a method to produce representations of the braid group $B_n$ of $n-1$
    generators ($n\leq \infty$). Moreover, we give sufficient conditions over a non
    unitary representation for being of this type. This method produces examples of
    irreducible representations of finite and infinite dimension.

  4. Parametrization of representations of braid groups.

    Authors: Claudia Maria Egea, Esther Galina
    Subjects: Representation Theory
    Abstract

    We give a method to produce representations of the braid group $B_n$ of $n-1$
    generators ($n\leq \infty$). Moreover, we give sufficient conditions over a non
    unitary representation for being of this type. This method produces examples of
    irreducible representations of finite and infinite dimension.

  5. Self-adjoint representations of braid groups.

    Authors: Claudia Maria Egea, Esther Galina
    Subjects: Representation Theory
    Abstract

    We give a method to construct new self-adjoint representations of the braid
    group. In particular, we give a family of irreducible self-adjoint
    representations of dimension arbitrarily large. Moreover we give sufficient
    conditions for a representation to be constructed with this method.

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