Geodesic
$L$-fuzzy ideal degrees in effect algebras
Kybernetika, Tome 58 (2022) no. 6, pp. 996-1015

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In this paper, considering $L$ being a completely distributive lattice, we first introduce the concept of $L$-fuzzy ideal degrees in an effect algebra $E$, in symbol $\mathfrak{D}_{ei}$. Further, we characterize $L$-fuzzy ideal degrees by cut sets. Then it is shown that an $L$-fuzzy subset $A$ in $E$ is an $L$-fuzzy ideal if and only if $\mathfrak{D}_{ei}(A)=\top,$ which can be seen as a generalization of fuzzy ideals. Later, we discuss the relations between $L$-fuzzy ideals and cut sets ($L_{\beta}$-nested sets and $L_{\alpha}$-nested sets). Finally, we obtain that the $L$-fuzzy ideal degree is an $(L,L)$-fuzzy convexity. The morphism between two effect algebras is an $(L,L)$-fuzzy convexity-preserving mapping.
DOI : 10.14736/kyb-2022-6-0996
Classification : 03B52, 03G27, 52A01
Keywords: effect algebra; $L$-fuzzy ideal degree; cut set; $(L, L)$-fuzzy convexity 
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     title = {$L$-fuzzy ideal degrees in effect algebras},
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     pages = {996--1015},
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Wei, Xiaowei; Shi, Fu-Gui. $L$-fuzzy ideal degrees in effect algebras. Kybernetika, Tome 58 (2022) no. 6, pp. 996-1015. doi: 10.14736/kyb-2022-6-0996

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