On regular separable countably compact $\mathbb{R}$-rigid spaces

TL;DR

This paper constructs examples of regular, countably compact, separable, and first countable $ eals$-rigid spaces, answering several open questions and demonstrating the consistency of such spaces existing under ZFC assumptions.

Contribution

It provides new constructions of regular countably compact $ eals$-rigid spaces with additional properties, addressing open problems and showing their consistency within ZFC.

Findings

Existence of regular countably compact $ eals$-rigid spaces with separability and first countability.

Answering questions posed by Tzannes, Banakh, and Ravsky.

Consistency of such spaces existing for all cardinals less than continuum.

Abstract

A topological space $X$ is said to be {\em $Y$-rigid} if any continuous map $f:X\rightarrow Y$ is constant. In this paper we construct a number of examples of regular countably compact $\mathbb R$-rigid spaces with additional properties like separability and first countability. This way we answer several questions of Tzannes, Banakh, Ravsky, as well as get a consistent example of $\mathbb R$-rigid Nyikos space. Also, we show that it is consistent with ZFC that for every cardinal $\kappa<\mathfrak c$ there exists a regular separable countably compact space $X$ which is $Y$-rigid with respect to any $T_1$ space $Y$ of pseudocharacter $\leq\kappa$.