Szego kernels, Toeplitz operators, and equivariant fixed point formulae

Details Szego kernels, Toeplitz operators, and equivariant fixed point formulae Szego kernels, Toeplitz operators, and equivariant fixed point formulae

2007-07-10

arxiv.org/abs/0707.1375v4

Mathematics

Algebraic Geometry

statement and proof simplified, exposition improved, references added

Scientific paper

Let $\gamma$ be an automorphism of a polarized complex projective manifold $(M,L)$. Then $\gamma$ induces an automorphism $\gamma_k$ of the space of global holomorphic sections of the $k$-th tensor power of $L$, for every $k=1,2,...$; for $k\gg 0$, the Lefschetz fixed point formula expresses the trace of $\gamma_k$ in terms of fixed point data. More generally, one may consider the composition of $\gamma_k$ with the Toeplitz operator associated to some smooth function on $M$. Still more generally, in the presence of the compatible action of a compact and connected Lie group preserving $(M,L,\gamma)$, one may consider induced linear maps on the equivariant summands associated to the irreducible representations of $G$. In this paper, under familiar assumptions in the theory of symplectic reductions, we show that the traces of these maps admit an asymptotic expansion as $k\to +\infty$, and compute its leading term.

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