In this article we recall a remarkable result stated as "For fixed ?, 0 < ? 1, the set of all bounded statistically convergent sequences order is closed linear subspace m (m real endowed with sup norm)" by Bhunia et al. (Acta Math. Hungar. 130 (1-2) (2012), 153-161) and to develop objective perception demonstrate that may not form in other sequence spaces. Also determine two different spaces...

Let K be a finite set of finite structures. We give a syntactic characterization of the property: every element of K is invective in ISP(K). We use this result to establish that 4 is invective in ISP(s) for every two-element algebra i. ?0. Introduction. Let K be a finite set of finite structures for a first-order language. In this paper we give a syntactic characterization (Theorem 4) of the pr...