INTERNATIONAL JOURNAL OF ANALYSIS AND APPLICATIONS, cilt.16, ss.317-327, 2018 (ESCI)
In this paper, the concept of lacunary invariant uniform density of any subset A of the set NxN is defined. Associate with this, the concept of lacunary I-2-invariant convergence for double sequences is given. Also, we examine relationships between this new type convergence concept and the concepts of lacunary invariant convergence and p-strongly lacunary invariant convergence of double sequences. Finally, introducing lacunary I-2*-invariant convergence concept and lacunary I-2-invariant Cauchy concepts, we give the relationships among these concepts and relationships with lacunary I-2-invariant convergence concept.