English

Overcrowding for zeros of Hyperbolic Gaussian analytic functions

Complex Variables 2023-08-08 v2 Probability

Abstract

We consider the family {fL}L>0\{f_L\}_{L>0} of Gaussian analytic functions in the unit disk, distinguished by the invariance of their zero set with respect to hyperbolic isometries. Let nL(r)n_L\left(r\right) be the number of zeros of fLf_L in a disk of radius rr. We study the asymptotic probability of the rare event where there is an overcrowding of the zeros as r1r\uparrow1, i.e. for every L>0L>0, we are looking for the asymptotics of the probability P[nL(r)V(r)]\mathbb{P}\left[n_L(r)\geq V(r)\right] with V(r)V\left(r\right) large compared to the E[nL(r)]\mathbb{E}\left[n_L\left(r\right)\right]. Peres and Vir\'ag showed that for L=1L=1 (and only then) the zero set forms a determinantal point process, making many explicit computations possible. Curiously, contrary to the much better understood planar model, it appears that for L<1L<1 the exponential order of decay of the probability of overcrowding when VV is close to E[nL(r)]\mathbb{E}\left[n_L\left(r\right)\right] is much less than the probability of a deficit of zeros.

Keywords

Cite

@article{arxiv.2209.05854,
  title  = {Overcrowding for zeros of Hyperbolic Gaussian analytic functions},
  author = {Keren Mor Waknin},
  journal= {arXiv preprint arXiv:2209.05854},
  year   = {2023}
}

Comments

23 pages. To appear in the Israel Journal of Mathematics

R2 v1 2026-06-28T01:11:53.950Z