On a general class of linear and positive operators.
Pop, Ovidiu T., Fărcaş, Mircea D., Bărbosu, Dan (2011)
Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
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Pop, Ovidiu T., Fărcaş, Mircea D., Bărbosu, Dan (2011)
Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
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Vijay Gupta, Naokant Deo (2011)
Matematički Vesnik
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Michele Campiti, Giorgio Metafune (1996)
Annales Polonici Mathematici
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We study a Kantorovich-type modification of the operators introduced in [1] and we characterize their convergence in the -norm. We also furnish a quantitative estimate of the convergence.
Ana Pradera, Enric Trillas (2006)
Mathware and Soft Computing
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This paper investigates the satisfaction of the Non-Contradiction (NC) and Excluded-Middle (EM) laws within the domain of aggregation operators. It provides characterizations both for those aggregation operators that satisfy NC/EM with respect to (w.r.t.) some given strong negation, as well as for those satisfying them w.r.t. any strong negation. The results obtained are applied to some of the most important known classes of aggregation operators.
Pei Wu (1994)
Banach Center Publications
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This is a survey paper on additive combinations of certain special-type operators on a Hilbert space. We consider (finite) linear combinations, sums, convex combinations and/or averages of operators from the classes of diagonal operators, unitary operators, isometries, projections, symmetries, idempotents, square-zero operators, nilpotent operators, quasinilpotent operators, involutions, commutators, self-commutators, norm-attaining operators, numerical-radius-attaining operators, irreducible...
Căbulea, Lucia (2008)
Acta Universitatis Apulensis. Mathematics - Informatics
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Rajeev Kumar, Romesh Kumar (2005)
Matematički Vesnik
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Lucyna Rempulska, Karolina Tomczak (2009)
Archivum Mathematicum
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We consider the Picard operators and in exponential weighted spaces. We give some elementary and approximation properties of these operators.
Farcaş, Mircea D. (2008)
Acta Universitatis Apulensis. Mathematics - Informatics
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Monika Herzog (2014)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
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In this paper we study approximation properties of partial modified Szasz-Mirakyan operators for functions from exponential weight spaces. We present some direct theorems giving the degree of approximation for these operators. The considered version of Szász-Mirakyan operators is more useful from the computational point of view.
George A. Anastassiou, Heinz H. Gonska (1995)
Annales Polonici Mathematici
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In recent papers the authors studied global smoothness preservation by certain univariate and multivariate linear operators over compact domains. Here the domain is ℝ. A very general positive linear integral type operator is introduced through a convolution-like iteration of another general positive linear operator with a scaling type function. For it sufficient conditions are given for shift invariance, preservation of global smoothness, convergence to the unit with rates, shape preserving...