We show that the sequence spaces a(0)(r), a(c)(r) and a(infinity)(r) are equal to the sets of all sequences whose Cesaro means of order 1 converge to 0, converge and are bounded. As a consequence of this, we are able to considerably simplify the known results and their proofs in [1, 2], and to add the characterisations of some more classes of matrix transformations.
机构:
Istanbul Commerce Univ, TR-34840 Istanbul, TurkeyUniv Putra Malaysia, Dept Math, Serdang 43400, Selangor, Malaysia
Savas, Ekrem
Kilicman, Adem
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机构:
Univ Putra Malaysia, Dept Math, Serdang 43400, Selangor, Malaysia
Univ Putra Malaysia, Inst Math Res, Serdang 43400, Selangor, MalaysiaUniv Putra Malaysia, Dept Math, Serdang 43400, Selangor, Malaysia