Extension of bounded linear functionals and best approximation in space with asymmetric norm
Abstract The present paper is concerned with the characterization of the elements of best approximation in a subspace \(Y\) of…
2004
Characterization of ε-nearest points in space with asymmetric seminorm
Abstract In this note we are concerned with the characterization of the elements of \(\varepsilon\)-best approximation (\varepsilon\)-nearest points) in a…
On the characterization of generalized nearest point
Abstract AuthorsCostica Mustăţa “Tiberiu Popoviciu” Institute of Numerical Analysis, Cluj-Napoca, Romania Keywords? Paper coordinatesC. Mustăţa, On the characterization of generalized…
Un Păltiniş clujean al matematicii
Abstract AuthorsRadu Precup Department of Mathematics Babes-Bolyai University, Cluj-Napoca, Romania Keywords? Paper coordinatesR. Precup, Un Păltiniş clujean al matematicii. Omagiu…
Operators generated by a quasi-scaling type function
Abstract In this paper we introduce linear approximation operators by using a scaling type function and a general bi-dimensional net.…
A generalization of Durrmeyer-type polynomials and their approximation
Abstract We propose a general class of polynomials investigating the convergence of the operators constructed on the basis of these…
Linear operators generated by a probability density function
Abstract In this paper we deal with linear positive operators of both discrete and integral type. For the former we…
Mastroianni operators revisited
Abstract The present paper focuses on a class of linear positive operators introduced by G. Mastroianni. An integral extension in…
Nonnegative solutions of nonlinear integral equations in ordered Banach spaces
AbstractThe main purpose of this paper is to make Krasnoselskii’s compression-expansion fixed point theorem applicable to nonlinear integral equations in…
A note on the solvability of the nonlinear wave equation
AbstractNew existence and localization results for the nonlinear wave equation are established by means of the Schauder fixed point theorem.…