3 papers
math.RA2026
On certain semigroups of finite monotone and order-decreasing partial transformations
Gonca Ayık, Hayrullah Ayık, Ilinka Dimitrova +1
Let be the semigroup consisting of all monotone and order-decreasing partial transformations, and let be the subsemigroup of $\mathcal{PMD}_…
math.RA2025
On certain semigroups of finite oriented and order-decreasing partial transformations
Gonca Ayık, Hayrullah Ayık, Ilinka Dimitrova +1
Let be the semigroup consisting of all oriented and order-decreasing partial transformations on the finite chain . Let $\mathcal{IORD}_…
math.RA2024
Presentations for monoids of endomorphisms of a star graph
Vitor H. Fernandes, Jörg Koppitz, Tiwadee Musunthia
In this paper, we consider the monoids of all endomorphisms, of all weak endomorphisms, of all strong endomorphisms and of all strong weak endomorphisms of a star graph with a fini…