The class of all BCK-algebras is a quasivariety.
Is´eki posed an interesting problem (solved by Wro´nski [16]) whether
the class of BCK-algebras is a variety. In connection with this problem, Komori
[10] introduced a notion of BCC-algebras, and Dudek [4] redefined the
notion of BCC-algebras by using a dual form of the ordinary definition in
the sense of Komori. Dudek and Zhang [6] introduced a new notion of ideals
in BCC-algebras and described connections between such ideals and congruences.
On the other hand, Jun and Xin [9] applied the notion of derivations
in ring and near-ring theory to BCI-algebras, and they also introduced a new
concept called a regular derivation in BCI -algebras. They investigated some of its properties, defined a d -derivation ideal and gave conditions for an ideal
to be d-derivation.Two years later, Hamza and Al-Shehri [8] studied derivation
in BCK-algebras. In [9], Hamza and Al-Shehri defined a left derivation
in BCI-algebras and investigated a regular left derivation. In [17, 18], the
notions of derivations of weak BCC-algebras were studied and some related
properties were also investigated. In this paper, we introduce the notion of t
-derivation on BCC-algebras and obtain some of its related properties and we
characterized Ker dbyt-derivations .