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On the ranks of certain semigroups of order-preserving partial isometries of a finite chain | ||
Journal of Algebra and Related Topics | ||
مقاله 2، دوره 6، شماره 2، اسفند 2018، صفحه 15-33 اصل مقاله (321.42 K) | ||
نوع مقاله: Research Paper | ||
شناسه دیجیتال (DOI): 10.22124/jart.2019.10875.1109 | ||
نویسندگان | ||
B. Ali1؛ M. A. Jada2؛ M. M. Zubairu* 3 | ||
1Department of Mathematics, Nigeria Defence Academy, Kano, Nigeria | ||
2Department of Mathematics, Bayero University Kano, Kano, Nigeria | ||
3Department of Mathematics, Faculty of Physical Sciences, Bayero University, Kano, Nigeria | ||
چکیده | ||
Let $X_n=\{1,2,\ldots,n\}$ be a finite chain, $\mathcal{ODP}_{n}$ be the semigroup of order-preserving partial isometries on $X_n$ and $N$ be the set of all nilpotents in $\mathcal{ODP}_{n}$. In this work, we study the nilpotents in $\mathcal{ODP}_{n}$ and investigate the ranks of two subsemigroups of $\mathcal{ODP}_{n}$; the nilpotent generated subsemigroup $\langle N\rangle$ and the subsemigroup ~$L(n,r)= \{ \alpha \in \mathcal{ODP}_{n} : |im~\alpha|\leq r\}$. | ||
کلیدواژهها | ||
Order-Preserving partial transformations؛ isometries؛ height and right (left) waist؛ idempotents and nilpotents | ||
آمار تعداد مشاهده مقاله: 845 تعداد دریافت فایل اصل مقاله: 1,129 |