Deferred conull FK-spaces

Abstract

In this paper, the concepts of deferred conullity for an FK-space X containing φ₁, and deferred wedgeness are defined. We also define deferred semi-conservative FK-space and give its relation to these concepts. The other hand, we have examined their relationship to ordinary conullity and Cesaro conullity. Furthermore, we have defined the deferred distinguished subspaces D_p^qW, D_p^qS, D_p^qF of an FK-space X. Also, we obtain some results for a summability domain Y_A to be deferred conull FK-space.