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The invertible, closed range, compact and Fredholm Multiplication operators are characterized in this paper.

In the present paper we introduce some sequence spaces overn-normed spaces defined by a Musielak-Orlicz function . We also study some topological properties and prove some inclusion relations between these spaces.

In the present paper we introduce some generalized difference double sequence spaces defined by a sequence of Orlicz-functions. We study some topological properties and some inclusion relations between these spaces. We also make an effort to study these properties over n-normed spaces. RESUMEN En este artículo introducimos algunos espacios de sucesiones doble-diferencia generalizadas definidas por una sucesión de funciones de Orlicz. Estudiamos algunas propiedades topológicas y algunas relaciones de inclusión entre estos espacios. Además, hacemos un esfuerzo para estudiar estas propiedades en espacios n-normados.

In the present paper we study difference sequence spaces defined by a sequence of modulus functions and examine some topological properties of these spaces. Subjclass[2000]:40A05, 40C05, 46A45.

In the present paper, we introduce some sequence spaces using ideal convergence and Musielak-Orlicz function ℳ = (M k). We also examine some topological properties of the resulting sequence spaces.

The purpose of this paper is to introduce some sequence spaces of fuzzy numbers defined by a Musielak-Orlicz function. We also make an effort to study some topological properties and prove some inclusion relations between these spaces.