关键词: Cone b-metric spaces over Banach algebras, c-distance, generalized Lipschitz mappings, fixed point

Abstract: The purpose of this paper is to improve some famous theorems for contractive mapping from ρ(α + β) ∈ [0,1/s) to ρ(α + β) ∈ [0, 1) in ordered cone b-metric spaces over Banach algebras with coefficient s ≥ 1(ρ(x) is the spectral radius of the generalized Lipschitz constant x). Moreover, some similar improvements in ordered cone b-metric spaces are also obtained, which from α + β∈ [0,1/s) to α + β∈ [0, 1). Some examples are given to support that our new results are genuine improvements and generalizations. 

Key words: Cone b-metric spaces over Banach algebras, c-distance, generalized Lipschitz mappings, fixed point