On a symbol class of elliptic pseudodifferential operators
S. Pilipović, N. Teofanov (2002)
Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques
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S. Pilipović, N. Teofanov (2002)
Bulletin, Classe des Sciences Mathématiques et Naturelles, Sciences mathématiques
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Duduchava, R., Natroshvili, D., Shargorodsky, E. (1995)
Georgian Mathematical Journal
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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...
Chudinovich, Igor, Constanda, Christian (2003)
Georgian Mathematical Journal
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Nasr-Isfahani, A. (1999)
Serdica Mathematical Journal
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Some relationships between representations of a hypergroup X, its algebras, and positive definite functions on X are studied. Also, various types of convergence of positive definite functions on X are discussed.
Gachechiladze, A., Natroshvili, D. (2001)
Georgian Mathematical Journal
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Takao Inoué, Adam Naumowicz, Noboru Endou, Yasunari Shidama (2011)
Formalized Mathematics
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In this article, we aim to prove the characterization of differentiation by means of partial differentiation for vector-valued functions on n-dimensional real normed linear spaces (refer to [15] and [16]).
Woźniakowski, Henryk (2001)
Georgian Mathematical Journal
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Abdelkefi, Chokri, Anker, Jean-Philippe, Sassi, Feriel, Sifi, Mohamed (2009)
SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
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Mario De Salvo, Domenico Freni, Giovanni Lo Faro (2008)
Matematički Vesnik
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Mohamed Barraa, Mohamed Boumazgour (2001)
Extracta Mathematicae
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Dennis Nemzer (1993)
Colloquium Mathematicae
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Let A be the class of all real-analytic functions and β the class of all Boehmians. We show that there is no continuous operation on β which is ordinary multiplication when restricted to A.