On the Domain of Four-Dimensional Forward Difference Matrix in Some Double Sequence Spaces

Orhan Tug, Eberhard Malkowsky, Vladimir Rakocevic +1

In this paper, we introduce some new double sequence spaces ${\mathcal{M}}_u(\Delta )$ and ${\mathcal{C}}_{\vartheta }(\Delta )$, where $\vartheta \in \{bp,bp0,r,r0\}$ as the domains of the four-dime…