B. Ali

collaborators

2 papers

math.GR2022

On the Ranks of Semigroup of Order-preserving or Order-reversing Partial Contraction Mappings on a Finite Chain

B. Ali, M. A. Jada, M. M. Zubairu

Let $C P_{n}$ be the semigroup of partial contraction mappings on $[n] = {1, 2, \dots, n}$ and let $O C P_{n}$ and $O R C P_{n}$ be its subsemigroups consisting of…

math.GR2018

Regularity and Green's relations for the semigroup of partial contractions of a finite chain

B. Ali, A. Umar, M. M. Zubairu

Let $[n] = {1, 2, \dots, n}$ be a finite chain and let $P_{n}$ be the semigroup of partial transformations on $[n]$ . Let $\mathcal{CP}_{n}=\{α\in \mathcal{P}_{n}: (for~all…