Abstract
Polynomial ensembles are determinantal point processes associated with (not necessarily orthogonal) projections onto polynomial subspaces. The aim of this survey article is to put forward the use of recurrence coefficients to obtain the global asymptotic behavior of such ensembles in a rather simple way. We provide a unified approach to recover well-known convergence results for real OP ensembles. We study the mutual convergence of the polynomial ensemble and the zeros of its average characteristic polynomial; we discuss in particular the complex setting. We also control the variance of linear statistics of polynomial ensembles and derive comparison results, as well as asymptotic formulas for real OP ensembles. Finally, we reinterpret the classical algorithm to sample determinantal point processes so as to cover the setting of nonorthogonal projection kernels. A few open problems are also suggested.
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Acknowledgements
This work has been written for the special issue of Constructive Approximation on the theme “Approximation and Statistical Physics” related to the workshop “Optimal and Random Point Configurations,” which took place at the Institut Henri Poincaré in June 2016. I would like to thank the organizers for giving me the opportunity to present the work [1] there. I also would like to thank Rémi Bardenet and Thomas Bloom for enriching discussions related to the present article. I acknowledge the support from CNRS through PEPS JCJC DppMc and from ANR through the grant ANR JCJC BoB (ANR-16-CE23-0003) and Labex CEMPI (ANR-11-LABX-0007-01).
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Communicated by Peter J. Forrester.
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Hardy, A. Polynomial Ensembles and Recurrence Coefficients. Constr Approx 48, 137–162 (2018). https://doi.org/10.1007/s00365-017-9413-3
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DOI: https://doi.org/10.1007/s00365-017-9413-3
Keywords
- Polynomial ensembles
- Determinantal point processes
- Global asymptotics
- Recurrence coefficients
- Nonhermitian kernels
- Sampling