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Doctoral Thesis
DOI
https://doi.org/10.11606/T.55.2023.tde-08012024-114709
Document
Author
Full name
Karina Navarro Gonzalez
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2023
Supervisor
Committee
Jordão, Thaís (President)
Peron, Ana Paula
Verri, Alessandra Aparecida
Vieira, Daniela Mariz Silva
Title in English
Covering number of the unit ball of Reproducing Kernel Hilbert Space of Schoenbergs kernels
Keywords in English
Covering numbers
Reproducing kernel Hilbert space
Schoenbergs kernel
Spherical harmonics
Abstract in English
In this work, we present accurate upper and lower bounds for the entropy/covering numbers of the unit ball for two general classes of Reproducing Kernel Hilbert Space (RKHS) on the unit sphere of Rd+1. In both classes, the RKHS is generated by an Schoenberg type kernel, it means, a positive definite continuous and zonal kernel. The upper and lower bounds we present carry precise information about the asymptotic constants, depending on the dimension of the sphere and the monotonic behavior of the Schoenberg/Fourier coefficients of the kernel we work with.
Title in Portuguese
Números de cobertura da bola unitária do espaço de Hilbert de Reprodução gerado por kernels de Schoenberg
Keywords in Portuguese
Espaços de Hilbert de reprodução
Harmônicos esféricos
Kernel de Schoenberg
Números de cobertura
Abstract in Portuguese
Neste trabalho, apresentamos estimativas superiores e inferiores para o número de entropia, ou números de cobertura, da bola unitária do Espaço de Hilbert de Reprodução (EHR), imerso no espaço das funções contínuas, para duas classes de EHRs sobre a esfera unitária de Rd+1. Em ambas as classes, o EHR é gerado por um núcleo do tipo Schoenberg, ou seja, um núcleo definido positivo, contínuo e zonal. Os limitantes superiores e inferiores que apresentamos carregam informações precisas sobre as constantes assintóticas, dependendo da dimensão da esfera e da monotonicidade dos coeficientes de Schoenberg/Fourier do kernel com que trabalhamos.
 
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Publishing Date
2024-01-08
 
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