Harmonic Analysis on Toric Varieties

Details Harmonic Analysis on Toric Varieties Harmonic Analysis on Toric Varieties

2003-03-26

arxiv.org/abs/math/0303337v1

Explorations in Complex and Riemannian Geometry: A Volume Dedicated to Robert E. Greene, Contemporary Mathematics, vol. 332, A

Mathematics

Complex Variables

20 pages

Scientific paper

Harmonic analysis on a toric Kahler variety M refers to the orthonormal basis of eigenfunctions of the complex torus action on the spaces H^0(M, L^N) of holomorphic sections of powers of a positive line bundle L and the Fourier multipliers that act on them. Using this harmonic analysis, we give an exact formula for the Szego kernel as a Fourier multiplier applied to the pull back of the Szego kernel of projective space under a monomial embedding. The Fourier multiplier involves a partition function of the convex lattice polytope P associated to M. We further prove that this Fourier multiplier is a Toeplitz operator, and as a corollary we obtain an oscillatory integral formula for the characters \chi_{NP} of the torus action on H^0(M, L^N).

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