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Absolute riesz summability factors
Periodica Mathematica Hungarica, 1989The pioneer work of \textit{G. Sunouchi} [Kōdai Math. Seminar Reports 6, 59-62 (1954; Zbl 0057.300)] was generalized by Rath. The authors have extended Rath's result in the Indian J. Pure Appl. Math. 16, 1162-1180 (1985; Zbl 0586.40004)]. The present work is an improvement over author's previous results in the sense that here the result is obtained by ...
Sukla, Indulata, Mohanty, Peari Charan
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ON SOME ABSOLUTE SUMMABILITY METHODS
Analysis, 1987Let \(\Sigma a_ n\) be a given infinite series with sequence of partial sums \(\{s_ n\}\). The series \(\Sigma a_ n\) is said to be summable \(| \bar N,P_ n|_ k,k\geq 1\), if \(\sum^{\infty}_{n=1}(P_ n/p_ n)^{k-1}| t_ n-t_{n-1}|^ k0\), \(P_ n=p_ 0+p_ 1+...+p_ n\to \infty\) and \(t_ n=P_ n^{- 1}\sum^{n}_{\nu =0}p_{\nu}S_{\nu}.\) In the special case when
Bor, H., Thorpe, B.
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On absolute riesz and absolute Nörlund summability
Periodica Mathematica Hungarica, 1992A study of the inclusion problem for \(| N,p|\subset| R,\lambda,k|\), \(k>0\), is taken up and a general theorem involving monotone functions \(p\) and \(\lambda\) is given. This theorem thus provides a counterpart of the theorem for the inclusion \(| R,\lambda,1|\subset| N,p|\) as given in [Indian J. Math. 7, 78-81 (1965; Zbl 0141.249); cf. also Rend.
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Some summability factor theorems for absolute summability
Analysis, 2002The authors obtain a set of sufficient conditions on methods of summability and on sequences \(\left(e_n\right)\), so that \(\sigma a_n\) summable \(\left|\overline N,p_n\right|_k\) implies \(\sigma a_n e_n\) summable \(\left|T\right|_k\), with \(k\) greater than or equal to 1. As corollaries they obtain the results of \textit{W. T. Sulaiman} [Proc. Am.
Rhoades, B. E., Savaş, Ekrem
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Some Theorems on Absolute Summability
Canadian Journal of Mathematics, 1951A summation method defined by the linear transformation will be called an l-l method if ∑|yr| < ∞ whenever ∑|xk| < ∞; if in addition we have ∑yr = ∑xk whenever ∑|xk| < ∞ we shall say the ...
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SOME PROPERTIES OF ABSOLUTE SUMMABILITY DOMAINS
Analysis, 1989\(\ell\) is the BK-space of sequences \(\{x_ k\}\) with convergent \(\sum | x_ k|\). Given an infinite matrix A, the A-transform of a sequence \(x=\{x_ k\}\) is written as Ax. We write \(\ell_ A=\{x:\) Ax\(\in \ell \}\) and assume \(\ell_ A\supset \phi\), the set of the finite sequences.
Macphail, M. S., Orhan, C.
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Absolute rate summability domains
Studia Scientiarum Mathematicarum Hungarica, 2004In this paper we show that for ℓπA, E and E′ are equivalent, and that if either Λ┴πA or IπA is invariant they both are, and then Λ┴πA = IπA = lπA.
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Positivity in Absolute Summability
1987For the investigation of absolute summability domains we employ two positivity concepts and two kinds of sectional operators. In particular we obtain a basic positivity result for Cesaro methods and subsequently two known results (of Hardy-Bohr type) concerning summability factors.
Wolfgang Beekmann, Karl Zeller
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