Results 21 to 30 of about 28,804 (256)

The automatic solution of partial differential equations using a global spectral method [PDF]

open access: yes, 2015
A spectral method for solving linear partial differential equations (PDEs) with variable coefficients and general boundary conditions defined on rectangular domains is described, based on separable representations of partial differential operators and ...
Olver, Sheehan, Townsend, Alex
core   +1 more source

On the Degree of Ill-Posedness of Multi-Dimensional Magnetic Particle Imaging [PDF]

open access: yes, 2017
Magnetic particle imaging is an imaging modality of relatively recent origin, and it exploits the nonlinear magnetization response for reconstructing the concentration of nanoparticles.
Jin, Bangti   +2 more
core   +3 more sources

Bivariate α,q-Bernstein–Kantorovich Operators and GBS Operators of Bivariate α,q-Bernstein–Kantorovich Type [PDF]

open access: yesMathematics, 2019
In this paper, we introduce a family of bivariate α , q -Bernstein–Kantorovich operators and a family of G B S (Generalized Boolean Sum) operators of bivariate α , q -Bernstein–Kantorovich type. For the former, we obtain the estimate of moments and central moments, investigate the degree of approximation for these bivariate ...
Qing-Bo Cai   +2 more
openaire   +2 more sources

POVMs: a small but important step beyond standard quantum mechanics [PDF]

open access: yes, 2006
It is the purpose of the present contribution to demonstrate that the generalization of the concept of a quantum mechanical observable from the Hermitian operator of standard quantum mechanics to a positive operator-valued measure is not a peripheral ...
et al., xx   +4 more
core   +2 more sources

Statistical approximation properties of Stancu type q-Baskakov-Kantorovich operators [PDF]

open access: yes, 2016
In the present paper, we consider Stancu type generalization of Baskakov-Kantorovich operators based on the q-integers and obtain statistical and weighted statistical approximation properties of these operators.
Jain, Dilip   +3 more
core   +1 more source

On the bivariate Shepard–Lidstone operators

open access: yesJournal of Computational and Applied Mathematics, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
CAIRA R   +2 more
openaire   +2 more sources

Derivatives pricing in energy markets: an infinite dimensional approach [PDF]

open access: yes, 2014
Based on forward curves modelled as Hilbert-space valued processes, we analyse the pricing of various options relevant in energy markets. In particular, we connect empirical evidence about energy forward prices known from the literature to propose ...
Benth, Fred Espen, Krühner, Paul
core   +3 more sources

The approximation of bivariate Chlodowsky-Szász-Kantorovich-Charlier-type operators

open access: yesJournal of Inequalities and Applications, 2017
In this paper, we introduce a bivariate Kantorovich variant of combination of Szász and Chlodowsky operators based on Charlier polynomials. Then, we study local approximation properties for these operators.
Purshottam Narain Agrawal   +2 more
doaj   +1 more source

Approximation by bivariate Chlodowsky type Szász–Durrmeyer operators and associated GBS operators on weighted spaces

open access: yesJournal of Inequalities and Applications, 2022
In this article, we consider a bivariate Chlodowsky type Szász–Durrmeyer operators on weighted spaces. We obtain the rate of approximation in connection with the partial and complete modulus of continuity and also for the elements of the Lipschitz type ...
Reşat Aslan, M. Mursaleen
doaj   +1 more source

(p,q)-Bivariate-Bernstein-Chlodowsky operators

open access: yesFilomat, 2018
In this article, we construct Bivariate-Bernstein-Chlodowsky operators based on (p,q)-integers. We give the basic estimates for these operators. Moreover, we discuss rate of convergence and pointwise approximation in Lipschitz class. In the last, we prove weighted approximation results.
Rao, Nadeem, Wafi, Abdul
openaire   +2 more sources

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