Jun, Young Bae; Song, Seok Zun Soft subalgebras and soft ideals of BCK/BCI-algebras related to fuzzy set theory. (English) Zbl 1188.06015 Math. Commun. 14, No. 2, 271-282 (2009). Summary: The notions of \(\in\)-soft set and q-soft set based on a fuzzy set are introduced, and characterizations for \(\in\)-soft sets and q-soft sets to be (idealistic) soft BCK/BCI-algebras are provided. Using the notion of \((\in,\in\vee \text{q})\)-fuzzy BCK/BCI subalgebras/ideals, characterizations for \(\in\)-soft sets and q-soft sets to be (idealistic) soft BCK/BCI-algebras are established. Cited in 5 Documents MSC: 06F35 BCK-algebras, BCI-algebras 03E72 Theory of fuzzy sets, etc. PDF BibTeX XML Cite \textit{Y. B. Jun} and \textit{S. Z. Song}, Math. Commun. 14, No. 2, 271--282 (2009; Zbl 1188.06015)