Year: 2026
Type: preprint
Abstract: For every nonzero rational-valued additive functional on the real line, we construct a Hausdorff nondiscrete topological vector group topology strictly finer than the usual topology. We prove that two such topologies coincide exactly when their coefficient functionals differ by a nonzero real rescaling; every other pair is incomparable. The family contains as many distinct topologies as there are subsets of the real line. Their supremum is still nondiscrete and strictly finer than every individual member. We also prove failure of first countability and existence of maximal nondiscrete extensions.
Source: arXiv (Cornell University)
Author: Yaroshevskaya, Irina
Language: English
Subfield: Geometry and Topology
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223043676