Displaying similar documents to “On the approximation by compositions of fixed multivariate functions with univariate functions”

Some remarks on mixed approximation problem

Sýkorová, Irena

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Several years ago, we discussed the problem of approximation polynomials with Milan Práger. This paper is a natural continuation of the work we collaborated on. An important part of numerical analysis is the problem of finding an approximation of a given function. This problem can be solved in many ways. The aim of this paper is to show how interpolation can be combined with the Chebyshev approximation.

Proximinality and co-proximinality in metric linear spaces

T.D. Narang, Sahil Gupta (2015)

Annales UMCS, Mathematica

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As a counterpart to best approximation, the concept of best coapproximation was introduced in normed linear spaces by C. Franchetti and M. Furi in 1972. Subsequently, this study was taken up by many researchers. In this paper, we discuss some results on the existence and uniqueness of best approximation and best coapproximation when the underlying spaces are metric linear spaces

Proximinality and co-proximinality in metric linear spaces

T. W. Narang, Sahil Gupta (2015)

Annales Universitatis Mariae Curie-Sklodowska, sectio A – Mathematica

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As a counterpart to best approximation, the concept of best coapproximation was introduced in normed linear spaces by C. Franchetti and M. Furi in 1972. Subsequently, this study was taken up by many researchers. In this paper, we discuss some results on the existence and uniqueness of best approximation and best coapproximation when the underlying spaces are metric linear spaces.