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  • on compact operators on the riesz bm Difference Sequence space
    Iranian Journal of Science and Technology (Sciences), 2011
    Co-Authors: Metin Başarır, Emrah Evren Kara
    Abstract:

    The compact operators on the Riesz Sequence space ݎ ௣ ௤ ሺܤ ௠ ሻ ሺ1 ൑ ݌ ൏ ∞ሻ have been studied by Basarir and Kara, "IJST (2011) A4, 279-285". In the present paper, we will characterize some classes of compact operators on the normed Riesz Sequence spaces ݎ ଴ ௤ ሺܤ ௠ ሻ and ݎ ஶ ௤ ሺܤ ௠ ሻ by using the Hausdorff measure of noncompactness.

  • On compact operators and some Euler B(m)-Difference Sequence spaces
    Journal of Mathematical Analysis and Applications, 2011
    Co-Authors: Emrah Evren Kara, Metin Başarır
    Abstract:

    Abstract Altay and Basar (2005) [1] and Altay, Basar and Mursaleen (2006) [2] introduced the Euler Sequence spaces e 0 t , e c t and e ∞ t . Basarir and Kayikci (2009) [3] defined the B ( m ) -Difference matrix and studied some topological and geometric properties of some generalized Riesz B ( m ) -Difference Sequence space. In this paper, we introduce the Euler B ( m ) -Difference Sequence spaces e 0 t ( B ( m ) ) , e c t ( B ( m ) ) and e ∞ t ( B ( m ) ) consisting of all Sequences whose B ( m ) -transforms are in the Euler spaces e 0 t , e c t and e ∞ t , respectively. Moreover, we determine the α-, β- and γ-duals of these spaces and construct the Schauder basis of the spaces e 0 t ( B ( m ) ) and e c t ( B ( m ) ) . Finally, we characterize some matrix classes concerning the spaces e 0 t ( B ( m ) ) and e c t ( B ( m ) ) and give the characterization of some classes of compact operators on the Sequence spaces e 0 t ( B ( m ) ) and e ∞ t ( B ( m ) ) .

  • on some Difference Sequence spaces of weighted means and compact operators
    Annals of Functional Analysis, 2011
    Co-Authors: Metin Başarır, Emrah Evren Kara
    Abstract:

    In the peresent paper, by using generalized weighted mean and dierence matrix of order m, we introduce the Sequence spaces X(u,v, (m) ), where X is one of the spaces '1, c or c0. Also, we determine the -, - and -duals of those spaces and construct their Schauder bases for X 2 {c,c0}. Morever, we give the characterization of the matrix mappings on the spaces X(u,v, m ) for X 2 {'1,c,c0}. Finally, we characterize some classes of compact operators on the spaces '1(u,v, m ) and c0(u,v, m ) by using the Hausdor measure of noncompactness.

  • on the generalized riesz b Difference Sequence spaces
    Filomat, 2010
    Co-Authors: Metin Başarır
    Abstract:

    In this paper, we define the new generalized Riesz B-Difference Sequence spaces r q (p, B ) , r q (p, B ) , r q (p, B ) and r q (p, B ) which consist of the Sequences whose R q B-transforms are in the linear spaces l1 (p) , c (p) , c0 (p) and l (p) , respectively, introduced by I.J.Maddox[8],[9]. We give some topological properties and compute the ®i, ¯ i and °iduals of these spaces. Also we determine the neccesary and sufficient conditions on the matrix transformations from these spaces into l1 and c.

  • on the generalized riesz Difference Sequence space and property
    Journal of Inequalities and Applications, 2009
    Co-Authors: Metin Başarır, Mustafa Kayikçi
    Abstract:

    We introduce the generalized Riesz Difference Sequence space Open image in new window which is defined by Open image in new window where Open image in new window is the Riesz Sequence space defined by Altay and Basar. We give some topological properties, compute the Open image in new window duals, and determine the Schauder basis of this space. Finally; we study the characterization of some matrix mappings on this Sequence space. At the end of the paper, we investigate some geometric properties of Open image in new window and we have proved that this Sequence space has property Open image in new window for Open image in new window .