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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2018.tde-20032018-142802
Document
Author
Full name
Regina Célia Guapo Pasquini
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1997
Supervisor
Committee
Zani, Sergio Luis (President)
Castelo Filho, Antonio
Ranga, Alagacone Sri
Title in Portuguese
Interpolação Hermiteana Usando Bases de Funções Radiais e Funções Regradas
Keywords in Portuguese
Não disponível
Abstract in Portuguese
Estudamos problemas de interpolação hermitiana em várias variáveis através de dois métodos distintos. O primeiro é uma extensão do método das bases de funções radiais para interpolação em várias variáveis. Ele baseia-se na transformada de Fourier de uma medida previamente fixada. As matrizes de interpolação produzidas por esse método são sempre positivas definidas. O segundo é uma extensão do método das funções regradas. O problema tem solução por esse método se, e somente se, uma certa matriz, denominada de matriz característica do problema, for positiva definida. Certas classes de funções completamente monótonas são utilizadas na construção de implementações dos métodos estudados.
Title in English
Not available
Keywords in English
Not available
Abstract in English
We study multivariable scattered Hermite interpolation via two distinct methods. The first one is an extension of the so-called radial-basis function method. In this case, the solutions are constructed from the Fourier transforms of certain finite measures and the associated interpolation matrices are always positive definite. The second one is an extension of the method known as interpolation by ridge functions. The existence of solutions by this method depends upon the positive definiteness of a certain matrix, here called the characteristic matrix of the problem. Certain classes of completely monotone functions are used to achieve simple realizations of the methods.
 
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Publishing Date
2018-03-26
 
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