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Fuzzy positive implicative ideals of BCK-algebras based on the theory of falling shadows. (English) Zbl 1207.06016
Summary: On the basis of the theory of a falling shadow, the notion of a falling fuzzy positive implicative ideal of a BCK-algebra is introduced. Relations between falling fuzzy positive implicative ideals and falling fuzzy ideals are given. Relations between fuzzy positive implicative ideals and falling fuzzy positive implicative ideals are provided.
06F35BCK-algebras, BCI-algebras
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