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Improved spectral cluster bounds for orthonormal systems

  • Tianyi Ren und An Zhang EMAIL logo
Veröffentlicht/Copyright: 15. Dezember 2023

Abstract

We improve the work [R. L. Frank and J. Sabin, Spectral cluster bounds for orthonormal systems and oscillatory integral operators in Schatten spaces, Adv. Math. 317 2017, 157–192] concerning the spectral cluster bounds for orthonormal systems at p = , on the flat torus and spaces of nonpositive sectional curvature, by shrinking the spectral band from [ λ 2 , ( λ + 1 ) 2 ) to [ λ 2 , ( λ + ϵ ( λ ) ) 2 ) , where ϵ ( λ ) is a function of λ that goes to 0 as λ goes to . In achieving this, we invoke the method developed in [J. Bourgain, P. Shao, C. D. Sogge and X. Yao, On L p -resolvent estimates and the density of eigenvalues for compact Riemannian manifolds, Comm. Math. Phys. 333 2015, 3, 1483–1527].

MSC 2020: 58J50; 35P15

Communicated by Christopher D. Sogge


Funding statement: Tianyi Ren is supported in part by the Fundamental Research Funds for the Central Universities Grant No. KG16-2508-01. An Zhang is supported in part by NSFC grants No. 11801536, and the Fundamental Research Funds for the Central Universities Grant No. YWF-22-T-204 and No. KG16248701..

Acknowledgements

The authors would like to thank the anonymous referee for the typos they pointed out and the suggestions they provided that help to make this article clearer.

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Received: 2023-07-17
Revised: 2023-11-01
Published Online: 2023-12-15
Published in Print: 2024-09-01

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