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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2017.tde-07122017-145058
Document
Author
Full name
Cristiano dos Santos
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2017
Supervisor
Committee
Jordão, Thaís (President)
Dimitrov, Dimitar Kolev
Menegatto, Valdir Antonio
Tozoni, Sergio Antonio
Title in Portuguese
Módulos de suavidade e relações com K-funcionais
Keywords in Portuguese
K-funcionais
Melhor aproximação
Módulos de suavidade
Abstract in Portuguese
Neste trabalho, primeiramente, exploramos certos módulos de suavidade e K - funcionais definidos na esfera unitária m - dimensional e suas propriedades, dando prioridade a suas equivalências assintóticas e comparação com o erro de melhor aproximação. Uma das principais referências utilizadas foi (DAI; XU, 2010). Posteriormente, consideramos um módulo de suavidade e um K-funcional em espaços mais gerais, os espaços compactos 2-homogêneos, classe de espaços esta que contém a classe das esferas. A relação entre estes objetos e o raio de aproximação do operador translação (translação esférica, no contexto esférico) foi estudada. As principais referências foram (PLATONOV, 2009) e (PLATONOV, 1997).
Title in English
Moduli of smoothness and relations with K-functional
Keywords in English
Best approximation
K-functional
Moduli of smoothness
Abstract in English
In this work, we firstly explored certain moduli of smoothness and K - functionals defined on the m-dimensional unit sphere and their properties, mainly their asymptotic equivalence and relation to the best approximation error. The main reference is (DAI; XU, 2010). Later we consider a moduli of smoothness and a K-functional on a general setting, namely two-point homogeneous spaces, which has the unit spheres as one of its classes. Relations between those tools and the rate of approximation of the shiffting operator were studied. The main references here were (PLATONOV, 2009) and (PLATONOV, 1997).
 
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Publishing Date
2017-12-07
 
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