1 citations · 1 across the 8 of their papers we have counts for
8 papers
On the monoid of order-preserving transformations of a finite chain whose ranges are intervals
Vítor H. Fernandes
In this note we give a presentation for the monoid of all order-preserving transformations of a -chain whose ranges are intervals. We also consider the submonoid …
Oriented transformations on a finite chain: another description
Vítor H. Fernandes
Following the new description of an oriented full transformation on a finite chain given recently by Higgins and Vernitski in "Orientation-preserving and orientation-reversing mapp…
On partial endomorphisms of a star graph
Ilinka Dimitrova, Vítor H. Fernandes, Jörg Koppitz
In this paper we consider the monoids of all partial endomorphisms, of all partial weak endomorphisms, of all injective partial endomorphisms, of all partial strong endomorphisms a…
On semigroups of orientation-preserving partial permutations with restricted range
De Biao Li, Vítor H. Fernandes
Let be a finite chain with elements , and let be the semigroup of all injective orientation-preserving partial transformations of $…
On monoids of endomorphisms of a cycle graph
Ilinka Dimitrova, Vítor H. Fernandes, Jörg Koppitz +1
In this paper we consider endomorphisms of an undirected cycle graph from Semigroup Theory perspective. Our main aim is to present a process to determine sets of generators with mi…
On the monoid of partial isometries of a wheel graph
Vítor H. Fernandes
In this paper, we consider the monoid of all partial isometries of a wheel graph with vertices. Our main objective is to determine the rank of . In the p…