Portada

FOURIER TRANSFORMS OF INVARIANT FUNCTIONS ON FINITE REDUCTIV IBD

SPRINGER
12 / 2004
9783540240204
Inglés

Sinopsis

The Fourier transforms of invariant functions on finite reductive Lie algebras are due to T.A. Springer (1976) in connection with the geometry of nilpotent orbits. In this book the author studies Fourier transforms using Deligne-Lusztig induction and the Lie algebra version of LusztigâÇÖs character sheaves theory. He conjectures a commutation formula between Deligne-Lusztig induction and Fourier transforms thatáhe proves in many cases. As an application the computation of the values of the trigonometric sums (on reductive Lie algebras) is shown to reduce to the computation of the generalized Green functions and to the computation of some fourth roots of unity.