English

Universality for zeros of random analytic functions

Probability 2012-10-02 v1 Complex Variables

Abstract

Let ξ0,ξ1,...\xi_0,\xi_1,... be independent identically distributed (i.i.d.) random variables such that \Elog(1+ξ0)<\E \log (1+|\xi_0|)<\infty. We consider random analytic functions of the form Gn(z)=k=0ξkfk,nzk, G_n(z)=\sum_{k=0}^{\infty} \xi_k f_{k,n} z^k, where fk,nf_{k,n} are deterministic complex coefficients. Let νn\nu_n be the random measure assigning the same weight 1/n1/n to each complex zero of GnG_n. Assuming essentially that 1nlogf[tn],nu(t)-\frac 1n \log f_{[tn], n}\to u(t) as nn\to\infty, where u(t)u(t) is some function, we show that the measure νn\nu_n converges weakly to some deterministic measure which is characterized in terms of the Legendre--Fenchel transform of uu. The limiting measure is universal, that is it does not depend on the distribution of the ξk\xi_k's. This result is applied to several ensembles of random analytic functions including the ensembles corresponding to the three two-dimensional geometries of constant curvature. As another application, we prove a random polynomial analogue of the circular law for random matrices.

Keywords

Cite

@article{arxiv.1205.5355,
  title  = {Universality for zeros of random analytic functions},
  author = {Zakhar Kabluchko and Dmitry Zaporozhets},
  journal= {arXiv preprint arXiv:1205.5355},
  year   = {2012}
}

Comments

26 pages, 8 figures, 1 table

R2 v1 2026-06-21T21:08:51.034Z