Y. Imai and K. Is¶eki introduced two classes of logical algebras: BCK-algebras and
BCI-algebras [9, 10]. It is known that the class of BCI-algebras is a generalization
of the class of BCK-algebras. In [5, 6], Q. P. Hu and X. Li introduced a wider class
of logical algebras: BCH-algebras. They have shown that the class of BCH-algebras
is further a generalization of the class of BCI-algebras. The authors of this paper
introduced a class of K-algebras with extended study in [12-15]. Recently, same
authors have proved in [15] that a class of K-algebras as a generalization of a family
of BCH=BCI=BCK-algebras.
K. H. Dar introduced the notions of left and right mappings over BCK-algebras in
[1] and further discussed in [2]. The notions of left and right mappings over BCI-
algebras have been discussed in [3]. In this paper we introduce the notion of BCH-
endomorphisms. Some more properties of left and right mappings of BCH-algebras
are investigated with special focus on the left map L0.