SOME NOTES ON MATRIX TRANSFORMS OF SUMMABILITY DOMAINS OF CESÀRO MATRICES

On generalized absolute Cesàro summability

In this paper, a main theorem dealing with | C, 1 |k summability factors has been generalized under more weaker conditions for | C,α, β |k summability factors. This theorem also includes some new results. Mathematics Subject Classification 2000: 40D15, 40F05, 40G05, 40G99.

Some inclusion theorems for absolute summability

Inclusion of absolute summability domains of matrices Factorable matrices Summability method of Cesàro a b s t r a c t In this work the inclusion relations between absolute summability domains of a normal matrix A and certain factorable matrices are described. Thus, some classes of factorable matrices transforming the absolute summability domain of A into a set of convergent or absolutely conve...

Factors for generalized absolute Cesàro summability

A positive sequence (bn) is said to be almost increasing if there exists a positive increasing sequence cn and two positive constants A and B such that Acn ≤ bn ≤ Bcn (see [1]). Obviously every increasing sequence is almost increasing but the converse need not be true as can be seen from the example bn = ne(−1) n . Let ∑ an be a given infinite series with partial sums (sn). We denote by tn n-th...

On summability domains

Some notes about matrices

1 Linear algebra and geometry on R, C If m, n are positive integers, we shall denote by L(R,R) the space of reallinear mappings from R to R, and by L(C,C) the space of complexlinear mappings from C to C. In the special case where m = n, we may simply write L(R), L(C), respectively. Also when m = n, we write I for the identity mapping on R or C, as appropriate. Using the standard basis for real ...