A characterization of the Banach property for summability matrices
A class of conservative four-dimensional matrices.
A class of statistical and -conservative matrices
In [5] and [10], statistical-conservative and -conservative matrices were characterized. In this note we have determined a class of statistical and -conservative matrices studying some inequalities which are analogous to Knopp’s Core Theorem.
A new proof of theorem of Toeplitz in summability theory.
A new type of difference sequence spaces.
A Non-Equivalence Theorem for Power Methods of Limitation.
A note on a Theorem of Ermakov
A note on matrix summability and rates on convergence
A summability approximation theorem for Taylor series of meromorphic functions.
A survey of certain results on strong approximation by orthogonal series
This is a survey of results in a particular direction of the theory of strong approximation by orthogonal series, related mostly with author's contributions to the subject.
Abel-type weighted means transformations into .
Abschnittskonvergenz und Umkehrsätze beim Euler-Verfahren.
Absolute almost convergence and absolute almost summability
Absolute summability properties of certain triangular matrices
Abstract Korovkin type theorems on modular spaces by -summability
Our aim is to change classical test functions of Korovkin theorem on modular spaces by using -summability.
Addendum to: "Sequences of 0's and 1's" (Studia Math. 149 (2002), 75-99)
There is a nontrivial gap in the proof of Theorem 5.2 of [2] which is one of the main results of that paper and has been applied three times (cf. [2, Theorem 5.3, (G) in Section 6, Theorem 6.4]). Till now neither the gap has been closed nor a counterexample found. The aim of this paper is to give, by means of some general results, a better understanding of the gap. The proofs that the applications hold will be given elsewhere.
Almost sure summability of subsequences in Banach spaces
An extension of Brudno-Mazur-Orlicz theorem
An Inclusion Theorem In The General Theory Of Matrix Convergence Methods
Analogues of some Tauberian theorems for stretchings.