2002

Extension and approximation of semi-Lipschitz functions on quasi-metric linear spaces

2 years ago

Abstract AuthorsCostica Mustata “Tiberiu Popoviciu” Institute of Numerical Analysis, Romanian Academy, Romania Keywords? Paper coordinatesC. Mustăţa, Extension and approximation of…

On the extremal semi-Lipschitz function

2 years ago

Abstract The extremal elements of the unit balls of Banach spaces play an important role in the study of the…

A Phelps type result for spaces with asymmetric norms

2 years ago

Abstract If \((X,||\cdot|)\) is a linear space with asymmetric norm and \(Y\) is a \(X\), for every \(f\in Y_{+}^{\ast}\) (the…

On approximation properties of Balázs-Szabados operators their Kantorovich extension

3 years ago

Abstract In this paper we deal with a sequence of positive linear operators \(\ R_{n}^{\left[ \beta \right] }\) approximating functions…

Stancu modified operators revisited

3 years ago

Abstract In this paper we construct a general positive approximation process representing an integral form in Kantorovich sense of the…

Approximation operators – solutions and questions

3 years ago

Abstract The paper gartes some results concerning linear approximation operators and it raises three open problems. AuthorsOctavian Agratini Department of…

On some wavelet type linear operators

3 years ago

Abstract In this paper is introduced a general a class \(\left( L_{k}\right)_{k\in\mathbb{Z}}\) of linear positive operators of wavelet type. The…

The mysterious wavelets world

3 years ago

Abstract This survey paper contains the basic ideas of windowed Fourier transform, wavelet transform, wavelet bases and multiresolution analysis, providing…

On some new operators of discrete type

3 years ago

Abstract In this paper we are dealing with a general class of linear and positive operators of discrete type. We…

On the rate of convergence for semigroups and processes of Feller type

3 years ago

Abstract Based on the probabilistic theory, the paper contains local estimates of the rate of convergence for contraction~\(C_{0}\)-semigroup. Simultaneously a…

2002

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