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Cubo (Temuco)

versión On-line ISSN 0719-0646


DE MALAFOSSE, BRUNO  y  RAKOEVIC, VLADIMIR. Calculations in New Sequence Spaces and Application to Statistical Convergence. Cubo [online]. 2010, vol.12, n.3, pp.121-138. ISSN 0719-0646.

In this paper we recall recent results that are direct consequences of the fact that (w(λ) ,w(λ)) is a Banach algebra. Then we define the set Wτ = Dτw and characterize the sets Wτ (A) where A is either of the operators Δ, ∑, Δ(λ), or C(λ). Afterwardswe consider the sets [A1,A2]Wτ of all sequences X such that A1 (λ)(|A2(μ) X|) ∈ Wτ where A1 and A2 are of the form C(ξ), C+ (ξ), Δ(ξ), or Δ+ (ξ) and it is given necessary conditions to get |A1 (λ),A2(μ)| Wτ in the form Wξ. Finally we apply the previous results to statistical convergence. So we have conditions to have xk → L(S(A)) where A is either of the infinite matrices D1/τC(λ)C(μ), D1/τΔ(λ)Δ(μ), D1/τΔ(λ)C(μ). We also give conditions to have xk → 0(S(A)) where A is either of the operators D1/τC+ (λ)Δ(μ), D1/τC(λ)C(μ), D1/τC+ (λ)C+(μ), or D1/τΔ(λ)C+(μ).

Palabras clave : Banach algebra; statistical convergence; Astatistical convergence; infinite matrix.

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