Intervals in partial monounary algebras
Danica Jakubı́ková-Studenovská · Mathematica Bohemica · 1991
In this paper the notion of an interval in a partial monounary algebra is introduced and pairs $(A,f)$, $(A,g)$ of partial monounary algebras are investigated such that each interval in $(A,f)$ is also an interval in $(A,g)$, and conversely.