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2005 | 3 | 3 | 430-474
Tytuł artykułu

Dual pairs and Kostant-Sekiguchi correspondence. II. Classification of nilpotent elements

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We classify the homogeneous nilpotent orbits in certain Lie color algebras and specialize the results to the setting of a real reductive dual pair. For any member of a dual pair, we prove the bijectivity of the two Kostant-Sekiguchi maps by straightforward argument. For a dual pair we determine the correspondence of the real orbits, the correspondence of the complex orbits and explain how these two relations behave under the Kostant-Sekiguchi maps. In particular we prove that for a dual pair in the stable range there is a Kostant-Sekiguchi map such that the conjecture formulated in [6] holds. We also show that the conjecture cannot be true in general.
Opis fizyczny
  • Nicholas Copernicus University
  • Nicholas Copernicus University
  • University of Oklahoma
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