International Journal of Mathematics and Mathematical Sciences Volume 2003 (2003), Issue 28, Pages 1783-1801doi:10.1155/S0161171203204324
We characterize the spaces sα(Δ), sα∘(Δ), and sα(c)(Δ) and we deal with some sets generalizing the well-known sets w0(λ), w∞(λ), w(λ), c0(λ), c∞(λ), and c(λ).