Liu, Chuan2024-07-122024-07-122019Liu, Chuan. (2019). Notes on free topological groups. International Conference of Mathematical Sciences (ICMS 2019). s. 18.978-605-2124-29-1https://hdl.handle.net/20.500.12415/2200In this note, we discuss some generalized metric properties on the subspace F4(X) of a free topological group F(X) on a metrizable space X and obtain several characterizations of Fr´echet-Urysohn and countable fun-tightness of F4(X).trCC0 1.0 Universalinfo:eu-repo/semantics/openAccessFree topological groupsFrechet-Urysohn spacesMetrizable spacesArticle1818