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- Eberhard Malkowsky, Vladimir Rakocevic
- Applied Mathematics and Computation
- 2007

We prove some general results for the determination of the β-duals of, and the characterisations of matrix transformations on matrix domains of arbitrary triangles in FK spaces. Our results contain… (More)

Abstract We establish some identities or estimates for the operator norms and Hausdorff measures of noncompactness of linear operators given by infinite matrices that map the matrix domains of… (More)

Necessary and sufficient conditions will be given for infinite matrices to be members of the following classes: (X,l^), (X.CES (q;a)), (X,[C l"* ) , (X,[C 1"" ) , (1 ,Y), and (CES.(a),Y), where " a •… (More)

AbstractIn this paper we investigate linear operators between arbitrary BK spaces X and spaces Y of sequences that are
$${\text{(}}\bar N,q)$$
summable or bounded. We give necessary and sufficient… (More)

Abstract In the past, several authors studied spaces of m -th order difference sequences, among them, H.Polat and F.Basar ([17]) defined the Euler spaces of m -th order difference sequences
e 0 r (… (More)

- Ivana Djolovic, Eberhard Malkowsky
- Appl. Math. Lett.
- 2009

Abstract We characterize the class ( ( c 0 ) T , ( c 0 ) T ) where T = ( t n k ) n , k = 0 ∞ and T = ( t n k ) n , k = 0 ∞ are triangles. Using the Hausdorff measure of noncompactness, we define the… (More)

- Bilâl Altay, Feyzi Basar, Eberhard Malkowsky
- Applied Mathematics and Computation
- 2009

The spaces a"0^r(@D),a"c^r(@D) and a"~^r(@D) introduced by Aydin and Basar [C. Aydin, F. Basar, Some new difference sequence spaces, Appl. Math. Comput. 157 (3) (2004) 677-693] can be considered as… (More)