Abstract:
We consider determinability of a topological space $X$ by a new derived algebraic object, the semigroup $CR(X)$ of all continuous binary relations on $X$ with the operation of composition of binary relations, and obtain results on the determinability of a $T_1$-space by the semigroup $CR(X)$ and of an arbitrary topological space $X$ by an algebraic system related to $CR(X)$. We prove that any finite topological space $X$ is absolutely determined by its semigroup $CR(X)$.
The work of the first author was financially supported by the Russian
Science Foundation under project 24-21-00117,
https://rscf.ru/en/project/24-21-00117/.
The work of the second author was performed under the framework of the State Assignment
of the Ministry of Science and Higher Education of the Russian Federation
(grant no. FEUZ-2023-0022).
Citation:
E.M. Vechtomov, M. V. Volkov, “Determinability of topological spaces by the semigroup of continuous binary relations”, Mat. Zametki, 117:2 (2025), 196–203; Math. Notes, 117:2 (2025), 208–213