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From Berry–Esseen to super-exponential
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).ORCID iD: 0000-0003-1193-8355
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).ORCID iD: 0000-0003-2943-7006
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Mathematics (Div.).ORCID iD: 0000-0001-5260-2239
2024 (English)In: Electronic Journal of Probability, E-ISSN 1083-6489, Vol. 29, article id 11Article in journal (Refereed) Published
Abstract [en]

For any integer m < n, where m can depend on n, we study the rate of convergence (Formula Presented) to its limiting Gaussian as n → ∞ for orthogonal, unitary and symplectic Haar distributed random matrices U of size n. In the unitary case, we prove that the total variation distance is less than (Formula Presented) times a constant. This result interpolates between the super-exponential bound obtained for fixed m and the 1/n bound coming from the Berry–Esseen theorem applicable when m ≥ n by a result of Rains. We obtain analogous results for the orthogonal and symplectic groups. In these cases, our total variation upper bound takes the form (Formula Presented) times a constant and the result holds provided n > 2m. For m = 1, we obtain complementary lower bounds and precise asymptotics for the L2-distances as n → ∞, which show how sharp our results are.

Place, publisher, year, edition, pages
Institute of Mathematical Statistics , 2024. Vol. 29, article id 11
Keywords [en]
classical compact groups, Haar measure, Hankel determinants, rate of convergence, Toeplitz determinants
National Category
Mathematical Analysis
Identifiers
URN: urn:nbn:se:kth:diva-344004DOI: 10.1214/23-EJP1068ISI: 001165378300001Scopus ID: 2-s2.0-85185324572OAI: oai:DiVA.org:kth-344004DiVA, id: diva2:1841374
Note

QC 20240229

Available from: 2024-02-28 Created: 2024-02-28 Last updated: 2025-12-05Bibliographically approved

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Courteaut, KlaraJohansson, KurtLambert, Gaultier

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