Magma-valued metric spaces

Abstract: In this paper, first we introduce dense unital magmas and magma-valued metric spaces. The density property of the ordered unital magmas, monoids, and hemirings helps us to generalize a couple of classical results related to the convergence and Cauchy property of sequences and series. For example, we prove that the Cauchy Condensation Test holds for Cauchy complete fields. We also introduce hemiring-valued pseudonormed rings which are a generalization of pseudonormed rings and valuation domains. Then, we prove that finite-dimensional algebras over hemiring-valued pseudonormed fields can be pseudonormed which is a generalization of a result by Albert.