关于双环单形子半群的拓扑化
On topologization of subsemigroups of the bicyclic monoid
AI总结:
研究证明双环单形子半群在包含无限多个幂等元时只能具有离散的Hausdorff移位连续拓扑,并且所有右连续或左连续的Hausdorff Baire拓扑均为离散。
摘要:
我们证明,如果双环单形${\mathscr{C}}(p,q)$的子半群$S$包含无限多个幂等元,则$S$只允许离散的 Hausdorff 移动连续拓扑。此外我们证明,对于半群$\mathscr{C}_+(a,b)$$(\mathscr{C}_-(a,b))$上的每一个右连续(左连续)Hausdorff Baire拓扑,都是离散的,并且对于双环单形也成立。
英文摘要:
We show that if a subsemigroup $S$ of the bicyclic monoid ${\mathscr{C}}(p,q)$ contains infinitely many idempotents then $S$ admits only the discrete Hausdorff shift-continuous topology. Also we proof that every right-continuous (left-continuous\emph) Hausdorff Baire topology on the semigroup $\mathscr{C}_+(a,b)$ $(\mathscr{C}_-(a,b))$ is discrete and the same statement holds for the bicyclic monoid.
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