Infinite Series Whose Topology of Convergence Varies From Point to Point

Abstract

This paper catalogues a variety of examples concerning a type of function of a $p$-adic integer variable defined by a formal series expression we have dubbed "$\mathcal{F}$-series". These series exhibit a new, previously undocumented form of point-wise convergence, one where the topology in which the limit of a sequence of functions ${\left\{f_n\right\}}_{n\ge 1}$ converges depends on the point at which the sequence is evaluated. In a manner comparable to the adele ring of a number field, functions defined by $\mathcal{F}$-series require considering different metric completions of an underlying field in order to be properly understood.

39 pages. This is a pre-print upload; this paper has been accepted for publication by the Journal of p-Adic Numbers, Ultrametric Analysis and Applications