On certain semigroups of finite oriented and order-decreasing partial transformations

Gonca Ayık, Hayrullah Ayık, Ilinka Dimitrova +1

Let ${\mathcal{P}\mathcal{O}\mathcal{RD}}_n$ be the semigroup consisting of all oriented and order-decreasing partial transformations on the finite chain $X_n=\{1<\cdots <n\}$. Let $\mathcal{IORD}_…