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arXiv 1006.4873math.GRmath.GN
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正整数几乎单调内射余有限部分自映射的拓扑幺半群

Topological monoids of almost monotone injective co-finite partial selfmaps of positive integers

Ivan Chuchman, Oleg Gutik

摘要:

本文研究了正整数集$\mathbb{N}$的部分余有限几乎单调双射变换半群$I_\infty^\dnearrow(N)$。证明了半群$I_\infty^\dnearrow(N)$具有与双循环半群相似的代数性质:它是双单的,它的所有非平凡群同态要么是同构,要么是群同态.证明了使$(I_\infty^\dnearrow(N),τ)$为拓扑半群的$I_\infty^\dnearrow(N)$上的Baire拓扑$τ$是离散的,刻画了拓扑半群中$(I_\infty^\dnearrow(N),τ)$的闭包,并构造了$I_\infty^\dnearrow(N)$上的非离散Hausdorff半群拓扑.

英文摘要:

In this paper we study the semigroup $I_\infty^\dnearrow(N)$ of partial co-finite almost monotone bijective transformations of the set of positive integers $\mathbb{N}$. We show that the semigroup $I_\infty^\dnearrow(N)$ has algebraic properties similar to the bicyclic semigroup: it is bisimple and all of its non-trivial group homomorphisms are either isomorphisms or group homomorphisms. Also we prove that every Baire topology $τ$ on $I_\infty^\dnearrow(N)$ such that $(I_\infty^\dnearrow(N),τ)$ is a semitopological semigroup is discrete, describe the closure of $(I_\infty^\dnearrow(N),τ)$ in a topological semigroup and construct non-discrete Hausdorff semigroup topologies on $I_\infty^\dnearrow(N)$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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