Commutative Pseudo Valuations on BCK-Algebras

Table 1

∗-operation.

∗	0	𝑎	𝑏	𝑐
0	0	0	0	0
𝑎	𝑎	0	0	𝑎
𝑏	𝑏	𝑎	0	𝑏
𝑐	𝑐	𝑐	𝑐	0