Implicative Ideals of BCK-Algebras Based on the Fuzzy Sets and the Theory of Falling Shadows

Table 4

∗-Multiplication.

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