Computers and Mathematics with Applications, cilt.62, sa.2, ss.814-820, 2011 (SCI-Expanded)
For a sequence x=(xk), we denote the difference sequence by Δx=(xk-xk-1). Let u=(uk)k=0∞ and v=(vk)k=0∞ be the sequences of real numbers such that uk≠0, vk≠0 for all k∈N. The difference sequence spaces of weighted means λ(u,v,Δ) are defined as λ(u,v,Δ)=x=(xk):W(x)∈λ, where λ= c,c0 and ℓ∞ and the matrix W=(wnk) is defined by wnk=un(vk-vk+1);(k