Results 21 to 30 of about 57,996,643 (272)

Approximation by positive linear operators in modular spaces by power series method

, 2017
In the present paper, we study the problem of approximation to a function by means of positive linear operators in modular spaces in the sense of power series method.
E. Taş, Tuğba Yurdakadim
semanticscholar   +1 more source

Indefinite Hamiltonian systems whose Titchmarsh–Weyl coefficients have no finite generalized poles of non-positive type [PDF]

, 2013
The two-dimensional Hamiltonian system (*)  y'(x)=zJH(x)y(x),  x∈(a,b), where the Hamiltonian H takes non-negative 2x2-matrices as values, and $J:= \begin{pmatrix} 0 & -1 \\ 1 & 0 \end{pmatrix}$, has attracted a lot of interest over the past decades ...
Harald Woracek, Matthias Langer, Langer, Matthias, Woracek, Harald   +3 more
core   +1 more source

Positive forms on Banach spaces [PDF]

, 2003
The first representation theorem establishes a correspondence between positive, self-adjoint operators and closed, positive forms on Hilbert spaces.
Farkas, Bálint, Matolcsi, Máté, M. Matolcsi, B. Farkas   +3 more
core   +1 more source

Pointwise simultaneous approximation by rational operators [PDF]

, 1991
We obtain pointwise simultaneous approximation estimates for rational operators which are not possible by algebraic ...
Mastroianni, G, G. Mastroianni, DELLA VECCHIA, Biancamaria, Della Vecchia, B   +3 more
core   +1 more source

Approximation by positive linear operators

Journal of Numerical Analysis and Approximation Theory, 1995
Not available.
Ioan Gavrea
doaj   +2 more sources

Statistical Blending-Type Approximation by a Class of Operators That Includes Shape Parameters λ and α

Mathematics, 2022
This paper is devoted to studying the statistical approximation properties of a sequence of univariate and bivariate blending-type Bernstein operators that includes shape parameters α and λ and a positive integer.
Qing-Bo Cai, K. Ansari, Merve Temizer Ersoy, Faruk Özger   +3 more
semanticscholar   +1 more source

The Θ-transformation of certain positive linear operators

International Journal of Mathematics and Mathematical Sciences, 1996
The intention of this paper is to describe a construction method for a new sequence of linear positive operators, which enables us to get a pointwise order of approximation regarding the polynomial summator operators which have “best” properties of ...
Aleandru Lupaş, Detlef H. Mache
doaj   +1 more source

Certain approximation properties of Brenke polynomials using Jakimovski–Leviatan operators

Journal of Inequalities and Applications, 2021
In this article, we establish the approximation by Durrmeyer type Jakimovski–Leviatan operators involving the Brenke type polynomials. The positive linear operators are constructed for the Brenke polynomials, and thus approximation properties for these ...
Shahid Ahmad Wani, M. Mursaleen, Kottakkaran Sooppy Nisar   +2 more
doaj   +1 more source

Approximation by positive operators in the space \(C^{(p)}([a,b])\)

Journal of Numerical Analysis and Approximation Theory, 1989
Not available.
Francesco Altomare, Ioan Raşa
doaj   +2 more sources

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source