English

Nowhere constant families of maps and resolvability

General Topology 2023-12-20 v1

Abstract

If XX is a topological space and YY is any set then we call a family F\mathcal{F} of maps from XX to YY nowhere constant if for every non-empty open set UU in XX there is fFf \in \mathcal{F} with f[U]>1|f[U]| > 1, i.e. ff is not constant on UU. We prove the following result that improves several earlier results in the literature. If XX is a topological space for which C(X)C(X), the family of all continuous maps of XX to R\mathbb{R}, is nowhere constant and XX has a π\pi-base consisting of connected sets then XX is c\mathfrak{c}-resolvable.

Keywords

Cite

@article{arxiv.2312.12257,
  title  = {Nowhere constant families of maps and resolvability},
  author = {István Juhász and Jan van Mill},
  journal= {arXiv preprint arXiv:2312.12257},
  year   = {2023}
}

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6 pages