New types of fuzzy ideals of BCI-algebras

The concepts of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\in_{\gamma},\in_{\gamma} \! \vee\,{\rm q}_{\delta})$$\end{document}-fuzzy (p-, q- and a-) ideals and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\overline{\in}_{\gamma},\overline{\in}_{\gamma} \! \vee\,{\rm \overline{q}}_{\delta})$$\end{document}-fuzzy (p-, q- and a-) ideals in BCI-algebras are introduced. Some new characterizations are investigated. In particular, we prove that a fuzzy set μ of a BCI-algebra X is an \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\in_{\gamma},\in_{\gamma} \! \vee\,{\rm q}_{\delta})$$\end{document}-fuzzy a-ideal of X if and only if it is both an \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\in_{\gamma},\in_{\gamma} \! \vee\,{\rm q}_{\delta})$$\end{document}-fuzzy p-ideal and an \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\in_{\gamma},\in_{\gamma} \! \vee\,{\rm q}_{\delta})$$\end{document}-fuzzy q-ideal.