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Character formulae for classical groups

100%

Frenkel P.

Open Mathematics

2006

tom 4

nr 2

242-249

We give formulae relating the value Xλ (g) of an irreducible character of a classical group G to entries of powers of the matrix g ε G. This yields a far-reaching generalization of a result of J.L. Cisneros-Molina concerning the GL 2 case [1].

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

86%

Daszkiewicz A., Kraśkiewicz W., Przebinda T.

Open Mathematics

2005

tom 3

nr 3

430-474

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.

Ograniczanie wyników

2 Open Mathematics

1 Daszkiewicz A.

1 Frenkel P.

1 Kraśkiewicz W.

1 Przebinda T.

1 2006

1 2005

Wyniki wyszukiwania

Character formulae for classical groups

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