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Master's Dissertation
DOI
https://doi.org/10.11606/D.45.1999.tde-20210729-022244
Document
Author
Full name
Jorge Ariel Brisset Páez
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1999
Supervisor
Title in Portuguese
Melhor coaproximação em espaços normados
Keywords in Portuguese
Análise Funcional
Abstract in Portuguese
Em 1972, Franchetti e Furi [F-F72] introduziram um tipo de aproximação em espaços normados chamado de melhor coaproximação. Este trabalho estuda a existência e a unicidade de melhor coaproximação em subconjuntos convexos, algumas caracterízaçõespara espaços de Hilbert e uma caracterização para espaços estritamente convexos. Também veremos a melhor coaproximação polinômica de uma função contínua e propriedades do operador melhor coaproximação
Title in English
not available
Abstract in English
In 1972, Franchetti and Furi [F-F72] introduced a kind of approximation in normed spaces, called best coapproximation. This work is concerned with the existence and uniqueness of best coapproximation by elements of convex subsets,characterizations of elements of best coapproximation, some characterizations of Hilbert spaces and a characterization of strictly convex spaces. Best polynomial coapproximation of continuous functions and properties of the best coapproximationoperator are also presented
 
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Publishing Date
2021-07-29
 
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