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arXiv 0810.2305math.SPmath.AGmath.CVmath.SG
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Toeplitz算子的等变渐近性

Equivariant asymptotics for Toeplitz operators

Roberto Paoletti

摘要:

近年来,极化复射影流形的Szegö核的等变分量的Tian-Zelditch渐近展开,以及它随后在标度极限方面的推广,在代数、辛几何和微分几何中发挥了重要作用。一个自然的问题是,是否存在这样的推广,即投影到全纯截面空间上的投影可以被投影到更一般的(非完备的)线性级数上的投影所取代。一种情况下,本身适合这样的分析,这是自然的几何量化的角度来看,是由线性系列确定施加谱界限上的不变的自伴Toeplitz算子。在本文中,我们专注于与缓慢收缩的光谱带的光谱投影仪的渐近性。

英文摘要:

In recent years, the Tian-Zelditch asymptotic expansion for the equivariant components of the Szegö kernel of a polarized complex projective manifold, and its subsequent generalizations in terms of scaling limits, have played an important role in algebraic, symplectic, and differential geometry. A natural question is whether there exist generalizations in which the projector onto the spaces of holomorphic sections can be replaced by the projector onto more general (non-complete) linear series. One case that lends itself to such analysis, and which is natural from the point of view of geometric quantization, is given by the linear series determined by imposing spectral bounds on an invariant self-adjoint Toeplitz operator. In this paper we focus on the asymptotics of the spectral projectors associated to slowly shrinking spectral bands.

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