Partial monounary algebras with common closed quasi-endomorphisms
Partial monounary algebras with common congruence relations
Partial monounary algebras with common quasi-endomorphisms
Partially-2-homogeneous monounary algebras
This paper is a continuation of [5], where -homogeneous and -set-homogeneous algebras were defined. The definitions are analogous to those introduced by Fraïssé [2] and Droste, Giraudet, Macpherson, Sauer [1] for relational structures. In [5] we found all 2-homogeneous and all 2-set-homogeneous monounary algebras when the homogenity is considered with respect to subalgebras, to connected subalgebras and with respect to connected partial subalgebras, respectively. The results of [3], where all...