Mathematica Slovaca, cilt.61, sa.2, ss.245-256, 2011 (SCI-Expanded)
This paper begins with new definitions for double sequence spaces. These new definitions are constructed, in general, by combining modulus function and nonnegative four-dimensional matrix. We use these definitions to establish inclusion theorems between various sequence spaces such as: If A = (am,n,k,l) be a nonnegative four-dimensional matrix such that and let f be a modulus, then ω″(A, f) ⊂ ω″∞(A, f) and ω″0(A, f) ⊂ ω″∞(A, f). © 2011 Versita Warsaw and Springer-Verlag Wien.