Results 41 to 50 of about 136 (132)

Approximation theory for weighted Sobolev spaces on curves [PDF]

open access: yes, 2001
17 pages, no figures.-- MSC2000 codes: 41A10, 46E35, 46G10.MR#: MR1882649 (2003c:42002)In this paper we present a definition of weighted Sobolev spaces on curves and find general conditions under which the spaces are complete.
Pestana Galván, Domingo   +6 more
core  

Voltage transients in thin-film InSb Hall sensor

open access: yes, 2017
The work is reached to study temperature transients in thin-film Hall sensors. We experimentally study InSb thin-film Hall sensor. We find transients of voltage with amplitude about 10 μV on the sensor ports after current switching.
Andrey Orlov   +3 more
core   +1 more source

Overiteration of d-variate tensor product Bernstein operators: A quantitative result (Dedicated to the memory of Professor Sorin Gal)

open access: yes
Extending an earlier estimate for the degree of approximation of over iterated univariate Bernstein operators towards the same operator of degree one, it is shown that an analogous result holds in the d-variate case.
ACU, Ana-Maria, GONSKA, Heiner
core   +1 more source

Weierstrass' theorem in weighted Sobolev spaces with k derivatives [PDF]

open access: yes, 2007
36 pages, no figures.-- MSC2000 codes: 41A10, 46E35, 46G10.MR#: MR2382639 (2008m:41022)Zbl#: Zbl 1177.41007We characterize the set of functions which can be approximated by smooth functions and by polynomials with the norm $$ \ \ ^{(j)}\ {W^{k,\infty}_w}=
Tourís, Eva   +3 more
core  

Fiber-optic filter fluorometer for emission detection of Protoporphyrin IX and its direct precursors – A preliminary study for improved Photodynamic Therapy applications

open access: yes, 2018
In this work we present first results of a laboratory manufactured filter-fluorometer to study differences in intensity and position of the main peaks of three porphyrins that appear during the Heme-Synthesis. Porphyrins play a major role in Photodynamic
Harald Gollnick   +5 more
core   +1 more source

Kernels and best approximations related to the system of ultraspherical polynomials [PDF]

open access: yes, 2005
22 pages, no figures.-- MSC2000 codes: 41A10; 41A17; 41A25; 42C10; 33C45.MR#: MR2129477 (2005k:41087)Zbl#: Zbl 1074.41003We study the uniformly bounded orthonormal system $ \Cal U_\lambda $ of functions $$ u_n (\lambda )}(x)=\varphi _n (\lambda )}(\cos x)
Marcellán, Francisco   +5 more
core   +1 more source

Superdense unbounded divergence of a class of interpolatory product quadrature formulas: Dedicated to Professor Gheorghe Coman on the occasion of his 80th anniversary

open access: yes, 2016
. The aim of this paper is to highlight the superdense unbounded divergence of a class of product quadrature formulas of interpolatory type on Jacobi nodes, associated to the Banach space of all real continuous functions defined on [-1; 1], and to a ...
MITREA, Alexandru I.
core  

Density of Polynomials in the L^2 Space on the Real and the Imaginary Axes and in a Sobolev Space [PDF]

open access: yes, 2009
2000 Mathematics Subject Classification: 41A10, 30E10, 41A65.In this paper we consider an L^2 type space of scalar functions L^2 M, A (R u iR) which can be, in particular, the usual L^2 space of scalar functions on R u iR.
Klotz, Lutz, Zagorodnyuk, Sergey M.
core  

Weighted Approximation by the Goodman–Sharma-Type Operators

open access: yes, 2012
P. E. Parvanov - The uniform weighted approximation errors of the Goodman–Sharma operators are characterized for functions.Равномерната теглова апроксимация с модифицирани по Гудман–Шарма опера-тори от тип на Бернщайн, Баскаков и Майер–Кьоних–Целер е ...
Първанов, Първан
core  

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