On the summability almost everywhere of orthonormal series by the method of first logarithmic means
J. Meder
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Displaying similar documents to “A survey of certain results on strong approximation by orthogonal series”
On the summability almost everywhere of orthonormal series by the method of first logarithmic means
Pointwise very strong approximation as a generalization of Fejér's summation theorem.
Łenski, Włodzimierz (2005)
Annales Mathematicae et Informaticae
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Further results concerning the Nörlund summability of orthogonal series
J. Meder (1965)
Annales Polonici Mathematici
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Absolute Nörlund summability and orthogonal series
J. Meder (1966)
Annales Polonici Mathematici
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On the absolute Nörlund summability of orthogonal series for a system of H-type
J. Meder (1967)
Colloquium Mathematicae
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On the Nörlund summability of orthogonal series
J. Meder (1963)
Annales Polonici Mathematici
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Pointwise strong approximation of almost periodic functions
Radosława Kranz, Włodzimierz Łenski, Bogdan Szal (2016)
Discussiones Mathematicae, Differential Inclusions, Control and Optimization
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We consider the class GM(₂β) in pointwise estimate of the deviations in strong mean of almost periodic functions from matrix means of partial sums of their Fourier series.
On absolute Nörlund summability factor of Legendre series
B. K. Beohar (1969)
Annales Polonici Mathematici
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On the rate of strong summability of double Fourier series
Włodzimierz Łenski, Maria Topolewska (1998)
Mathematica Bohemica
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Estimates of the strong means of Marcinkiewicz type with the Cesaro means of negative order in one of the variables instead of square partial sums are obtained by characteristics constructed on the basis of moduli of continuity.
Absolute almost convergence and absolute almost summability
S. Nanda (1987)
Matematički Vesnik
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New results for almost increasing sequences
Bağdagül Kartal (2019)
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
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In the present paper, two theorems of absolute summability have been proved by using the definition of almost increasing sequence.
On the strong summability and approximation of Fourier series
L. Leindler (1979)
Banach Center Publications
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Some remarks on strong approximation by Cesàro means
Hans-Jürgen Schmeisser, Winfried Sickel (1989)
Banach Center Publications
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