Lower bounds for summability matrices on weighted sequence spaces.
Norms of certain operators on weighted spaces and Lorentz sequence spaces.
Some inequalities involving upper bounds for some matrix operators. I
In this paper we consider the problem of finding upper bounds of certain matrix operators such as Hausdorff, Nörlund matrix, weighted mean and summability on sequence spaces and Lorentz sequence spaces , which was recently considered in [9] and [10] and similarly to [14] by Josip Pecaric, Ivan Peric and Rajko Roki. Also, this study is an extension of some works by G. Bennett on spaces, see [1] and [2].
Lower bounds for matrices on block weighted sequence spaces. I
In this paper we consider some matrix operators on block weighted sequence spaces . The problem is to find the lower bound of some matrix operators such as Hausdorff and Hilbert matrices on . This study is an extension of papers by G. Bennett, G.J.O. Jameson and R. Lashkaripour.
Norm and lower bounds of operators on weighted sequence spaces
On the fine spectrum of generalized upper double-band matrices over the sequence space
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