Connectedness modulo a topological property
Abstract
Let be a topological property. We say that a space is -connected if there exists no pair and of disjoint cozero-sets of with non- closure such that the remainder is contained in a cozero-set of with closure. If is taken to be "being empty" then -connectedness coincides with connectedness in its usual sense. We characterize completely regular -connected spaces, with subject to some mild requirements. Then, we study conditions under which unions of -connected subspaces of a space are -connected. Also, we study classes of mappings which preserve -connectedness. We conclude with a detailed study of the special case in which is pseudocompactness. In particular, when is pseudocompactness, we prove that a completely regular space is -connected if and only if is connected, and that -connectedness is preserved under perfect open continuous surjections. We leave some problems open.
Cite
@article{arxiv.1205.5203,
title = {Connectedness modulo a topological property},
author = {M. R. Koushesh},
journal= {arXiv preprint arXiv:1205.5203},
year = {2015}
}
Comments
12 pages