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The purpose of this paper is to consider some F-contraction mappings in a dualistic partial metric space and to provide sufficient related conditions for the existence of a fixed point. The obtained results are extensions of several ones existing in the literature. Moreover, we present examples and an application to support our results. [ABSTRACT FROM AUTHOR]

In 1964 Borwein presented functional characterization of the normed linear spaces wp and Wp. These two spaces are clearly linked to Cesàro summability [C, 1] in particular it should be noted that a sequence x in wp if and only if x is Cesàro summable. The goal of this paper includes extension of these notions to double function space thus producing multidimensional analog of Borwein's results. [ABSTRACT FROM AUTHOR]

In this paper, using the difference operator of order m and a lacunary sequence $$\theta = (k_{r})$$ , we introduce and examine some classes of sequences of fuzzy numbers. Furthermore, we study some of their properties like completeness, solidity, symmetricity and convergence free. We also give some inclusion relations related to these classes. [ABSTRACT FROM AUTHOR]

This paper presents multidimensional characterizations of equivalence classes of double sequences. These characterizations will be analyzed by presenting theorems of the following type: If A is convergent preserving over $${\{x \in S^{\prime\prime}_{0} : x \;{\rm equivalent \; to}\; b\}}$$ then there exists a $${b^{\prime} \in S^{\prime\prime}_{0}}$$ such that b converges faster than b′ and A is convergent preserving over $${\{x \in S^{\prime\prime}_{0} : x \; {\rm equivalent \; to}\; b^{\prime}\}.}$$ [ABSTRACT FROM AUTHOR]

The purpose of this paper is to introduce some new generalized double difference sequence spaces using summability with respect to a two valued measure and an Orlicz function in 2-normed spaces which have unique non-linear structure and to examine some of their properties. This approach has not been used in any context before. [ABSTRACT FROM AUTHOR]