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University of Ulm, Faculty of Mathematics and Economics
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Absolute phi-summability with a power for A-methods
Department of Stochastics
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General Information
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Abstract
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In this paper we give necessary and sufficient conditions
for a sequence  of
complex numbers to be summability factors of type
for various (r,s) combinations,
where A is an
matrix of summability and B is a triangular
matrix of summability satisfying certain regularity conditions.
As examples we discuss summability factors of the above type
in the case B=Zß;, the method of
Silverman-Szasz, and in case A=Ma
and B=Mb with Ma
and Mb being summability
methods of weighted means.
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