M. Zubairu

activity

20182025

most citedOn certain semigroups of partial contractions of a finite chain

3 citations · 9 across the 10 of their papers we have counts for

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10 papers · 1 filter

math.GR2025

The monoid of monotone and decreasing partial transformations on a finite chain

Muhammad Mansur Zubairu, Abdullahi Umar, Fatma Salim Al-Kharousi

In this article, we consider the monoid of all monotone and order-decreasing partial transformations denoted as $D O RP_{n}$ on an $n$ ordered chain $[n] = {1, \dots, n}$ ,…

math.GR2025

On the small Schröder semigroup $SS_{n}^{'}$

Muhammad Mansur Zubairu, Abdullahi Umar, Fatma Salim Al-Kharousi

Let $[n]$ be a finite $n -$ chain ${1, 2, \dots, n}$ , and let $LS_{n}$ be the Schröder monoid, consisting of all isotone and order-decreasing partial transformations on $…

math.GR2024

On injective partial Catalan monoids

F. S. Al-Kharousi, A. Umar, M. M. Zubairu

Let $[n]$ be a finite chain ${1, 2, \dots, n}$ , and let $I C_{n}$ be the semigroup consisting of all isotone and order-decreasing injective partial transformations on $…

math.GR2024

On the algebraic structure of the Schröder monoid

Muhammad Mansur Zubairu, Abdullahi Umar, Fatma Salim Al-Kharousi

Let $[n]$ be a finite chain ${1, 2, \dots, n}$ , and let $LS_{n}$ be the semigroup consisting of all isotone and order-decreasing partial transformations on $[n]$ . More…

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.GR2022

On the combinatorial and rank properties of certain subsemigroups of full contractions of a finite chain

Muhammad Mansur Zubairu, Abdullahi Umar, Muhammad Jada Aliyu

Let $[n] = {1, 2, \dots, n}$ be a finite chain and let $C T_{n}$ be the semigroup of full contractions on $[n]$ . Denote $O R C T_{n}$ and $O C T_{n}$ to be th…

math.GR2022★ 1 cited

On certain Semigroup of Order-decreasing Full Contraction Mappings of a Finite Chain

M. M. Zubairu, A. Umar, J. A. Aliyu

Let $C T_{n}$ be the semigroup of full contraction mappings on $[n] = {1, 2, \dots, n}$ , and let $O C T_{n}$ and $O D C T_{n}$ be the subsemigroups consisting of al…

math.GR2018★ 2 cited

On certain semigroups of full contractions of a finite chain

A. Umar, M. M. Zubairu

Let $[n] = {1, 2, \dots, n}$ be a finite chain and let $T_{n}$ be the semigroup of full transformations on $[n]$ . Let $\mathcal{CT}_{n}=\{α\in \mathcal{T}_{n}: (for ~all~x,…

math.GR2018★ 3 cited

On certain semigroups of partial contractions of a finite chain

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…

math.GR2018★ 3 cited

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…

The monoid of monotone and decreasing partial transformations on a finite chain

On the small Schröder semigroup SSn′​

On injective partial Catalan monoids

On the algebraic structure of the Schröder monoid

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

On the combinatorial and rank properties of certain subsemigroups of full contractions of a finite chain

On certain Semigroup of Order-decreasing Full Contraction Mappings of a Finite Chain

On certain semigroups of full contractions of a finite chain

On certain semigroups of partial contractions of a finite chain

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

On the small Schröder semigroup $SS_{n}^{'}$