Hüseyın Bor (1991)
Annales Polonici Mathematici
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Four theorems of Ahmad [1] on absolute Nörlund summability factors of power series and Fourier series are proved under weaker conditions.
Bor, Hüseyin (2009)
Bulletin of Mathematical Analysis and Applications [electronic only]
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Tevzadze, V. (2006)
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Nadibaidze, G. (1995)
Georgian Mathematical Journal
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W. Sulaiman (1999)
Colloquium Mathematicae
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A general theorem concerning many absolute summability methods is proved.
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Kragujevac Journal of Mathematics
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Sulaiman, W.T. (1999)
International Journal of Mathematics and Mathematical Sciences
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Akhobadze, T. (2000)
Georgian Mathematical Journal
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