New composition results of Stepanov (μ,ν)-pseudo almost periodic functions

Abstract

Motivated by [17], in this paper, wegive sufficient conditions ensuring that the space SpPAP(R,Z, ?, ?) of (?, ?)-pseudo almost periodic functions in Stepanov?s sense is invariant by translation. Also, we provide new composition theorems of (?, ?)-pseudo almost periodic functions in the sense of Stepanov.