APPROXIMATION OF CLASSES OF PERIODIC MULTIVARIABLE FUNCTIONS BY LINEAR POSITIVE OPERATORS [PDF]
, 2006 In an N-dimensional space, we consider the approximation of classes of translation-invariant periodic functions by a linear operator whose kernel is the product of two kernels one of which is positive.
Bushev, Dmytro Mykolayovych +3 more
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A generalization of Kantorovich operators for convex compact subsets [PDF]
, 2016 In this paper we introduce and study a new sequence of positive linear operators acting on function spaces defined on a convex compact subset. Their construction depends on a given Markov operator, a positive real number and a sequence of probability ...
Altomare, Francesco +3 more
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Approximation numbers of composition operators on $H^p$ spaces of Dirichlet series [PDF]
, 2015 By a theorem of Bayart, $\varphi$ generates a bounded composition operator on the Hardy space $\Hp$of Dirichlet series ($1\le p1/2$ if $c_0=0$ and is either identically zero or maps the right half-plane into itself if $c_0$ is positive.
Bayart, Frédéric +2 more
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Statistical rates in approximation by positive linear operators [PDF]
Miskolc Mathematical Notes, 2011 This study is the continuation of our former work [O. Duman and E. Erkus,, Comput. Math. Appl. 52 (2006) 967-974] in which we obtained a statistical Korovkin-type approximation theorem for a sequence of positive linear operators defined on the space of all real-valued continuous and 2 pi periodic functions on the real m-dimensional space. In this paper,
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Approximation numbers of composition operators on the $H^2$ space of Dirichlet series [PDF]
, 2014 By a theorem of Gordon and Hedenmalm, $\varphi$ generates a bounded composition operator on the Hilbert space $\mathscr{H}^2$ of Dirichlet series $\sum_n b_n n^{-s}$ with square-summable coefficients $b_n$ if and only if $\varphi(s)=c_0 s+\psi(s)$, where
Queffélec, Hervé, Seip, Kristian
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Large N limit of SO(N) gauge theory of fermions and bosons [PDF]
, 2002 In this paper we study the large N_c limit of SO(N_c) gauge theory coupled to a Majorana field and a real scalar field in 1+1 dimensions extending ideas of Rajeev. We show that the phase space of the resulting classical theory of bilinears, which are the
Aoki K. +18 more
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Statistical fuzzy approximation by fuzzy positive linear operators
Computers & Mathematics with Applications, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Anastassiou, George A., Duman, Oktay
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On Strong Approximation of Functions by Certain Linear Operators [PDF]
, 2004 This note is motivated by the results on the strong approximation of 2Π-periodic functions by means of trigonometric Fourier series.In this note is investigated certain class of positive linear operators in the polynomial weighted spaces.
Rempulska, Lucyna, Skorupka, Mariola
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Approximation of functions of two variables by certain linear positive operators
, 2007 We introduce certain linear positive operators and study some approximation properties of these operators in the space of functions, continuous on a compact set, of two variables.
Bascanbaz-Tunca, Gulen +2 more
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Effects of two-site composite excitations in the Hubbard model
, 2004 The electronic states of the Hubbard model are investigated by use of the Composite Operator Method. In addition to the Hubbard operators, two other operators related with two-site composite excitations are included in the basis.
A Avella +8 more
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