In this paper, we define a non-Newtonian superposition operator N P f where f : N × R(N) α → R(N) β by N P f (x) = f (k, x k) ∞ k=1 for every non-Newtonian real sequence x = (x k). Chew and Lee [4] have characterized P f : p → 1 and P f : c 0 → 1 for 1 ≤ p < ∞. The purpose of this paper is to generalize these works respect to the non-Newtonian calculus. We characterize N P f : ∞ (N) → 1 (N) , N P f : c 0 (N) → 1 (N) , N P f : c (N) → 1 (N) and N P f : p (N) → 1 (N), respectively. Then we show that such N P f : ∞ (N) → 1 (N) is *-continuous if and only if f (k, .) is *-continuous for every k ∈ N.

Many investigations have been made about of non-Newtonian calculus and superposition operators until today. Non-Newtonian superposition operator was defined by Sagır and Erdogan in [9]. In this study, we have defined *-boundedness and *-locally boundedness of operator. We have proved that the non-Newtonian superposition operator N P f : c 0,α → 1,β is *-locally bounded if and only if f satisfies the condition (N A 2 ). Then we have shown that the necessary and sufficient conditions for the *-boundedness of N P f : c 0,α → 1,β . Finally, the similar results have been also obtained for N P f : cα → 1,β .

Many studies have been done on superposition operators and non-Newtonian calculus from past to present. Sağır and Erdoğan defined Non-Newtonian superposition operators and characterized them on some sequence spaces. Also they examined *-boundedness and *locally boundedness of Non-Newtonian superposition operators c0,α and cα to l1,β. In this study, we define *-continuity and *-uniform continuity of operator. We have proved that the necessary and sufficient conditions for the *-continuity of the non-Newtonian superposition operator c0,α to l1,β. Then we examined the relationship between the *-uniform continuity and the *-boundedness of the non-Newtonian superposition operator. Also, the similar results have been researched for the Non-Newtonian superposition operator cα to l1,β.