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arXiv:2403.15552v1 Announce Type: new
Abstract: A space is functionally countable if every real-valued continuous function has countable image. A stronger property recently defined by Tkachuk is exponentially separability. We start by studying these properties in GO spaces, where we extend results by Tkachuk and Wilson, and prove a conjecture by Dow. We also study some subspaces of products that are functionally countable. Finally, we give some examples of functionally countable spaces that are separable and uncountable.
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