摘要
Let A = (a j.k ) j.k≤1 be a non-negative matrix. In this paper, we characterize those A for which ||A|| E,F are determined by their actions on decreasing sequences, where E and F are suitable normed Riesz spaces of sequences. In particular, our results can apply to the following spaces: ℓ p , d(w, p), and ℓ p (w). The results established here generalize ones given by Bennett; Chen, Luor, and Ou; Jameson; and Jameson and Lashkaripour. ©Canadian Mathematical Society 2008.