English

Tychonoff spaces and a ring theoretic order on $\text{C}(X)$

General Topology 2020-05-20 v1

Abstract

The reduced ring order (rr-order) is a natural partial order on a reduced ring RR given by rrrsr\le_{\text{rr}} s if r2=rsr^2=rs. It can be studied algebraically or topologically in rings of the form C(X)\text{C}(X). The focus here is on those reduced rings in which each pair of elements has an infimum in the rr-order, and what this implies for XX. A space XX is called rr-good if C(X)\text{C}(X) has this property. Surprisingly both locally connected and basically disconnected spaces share this property. The rr-good property is studied under various topological conditions including its behaviour under Cartesian products. The product of two rr-good spaces can fail to be rr-good (e.g., βR×βR\beta \mathbf{R}\times \beta \mathbf{R}), however, the product of a PP-space and an rr-good weakly Lindel\"of space is always rr-good. PP-spaces, FF-spaces and UU-spaces play a role, as do Glicksberg's theorem and work by Comfort, Hindman and Negrepontis.

Keywords

Cite

@article{arxiv.2005.09395,
  title  = {Tychonoff spaces and a ring theoretic order on $\text{C}(X)$},
  author = {W. D. Burgess and R. Raphael},
  journal= {arXiv preprint arXiv:2005.09395},
  year   = {2020}
}
R2 v1 2026-06-23T15:39:28.643Z