Volume 21, Number 12, 2020
Contents
Special Issue on Fuzzy Convex Structures and Some Related Topics
Open
Xiao-Li Meng, Liu-Tang Gong and Jen-Chih Yao
An inequality evaluation approach with nonincreasing returns to scale
Open
Xiao-Li Meng, Jen-Chih Yao, Liu-Tang Gong and Bao-Xiang Liu
Fuzzy ST model for data envelopment analysis
Open
Zhen-Yu Xiu, Lingqiang Li and Yue Zhu
A degree approach to special mappings between (L,M)-fuzzy convex spaces
Faisal Mehmood, Fu-Gui Shi and Khizar Hayat
A new approach to the fuzzification of rings
Open
Kai Wang
L-valued convex non-correlation structures
Chaozan Fan, Fu-Gui Shi and Faisal Mehmood
M-Hazy Γ-semigroup
Lan Wang and Fu-Gui Shi
Sequential compactness of L-fuzzy sets
Open
Xiao-Wu Zhou and Lan Wang
Four kinds of special mappings between M-fuzzifying convex spaces
3
Open
Zhen-Yu Xiu
Convergence structures in L-concave spaces
Hui Yang and Er-Qiang Li
A new approach to interval operators in L-convex spaces
Wei Yao and Chang-Jie Zhou
Representation of sober convex spaces by join-semilattices
Yan Yan Dong and Juan Li
Fuzzy convex structure and prime fuzzy ideal space on residuated lattices
Chengyu Liang and Fei Li
S
3
and S
4
separation axioms in M-fuzzifying convex spaces
Qing-Hua Li
Modified L-fuzzy N-convergence structures
Lin Zhang and Bin Pang
Strong L-concave structures and L-convergence structures
Yi Shi and Han-Liang Huang
A characterization of strong Q-concave spaces
HongYan Li and Kai Wang
L-ordered neighborhood systems of stratified L-concave structures
Yu Zhong, Shuang Lin and Fan-Hong Chen
An L-fuzzy convex structure induced by L-subuniverse degrees
Xiaowei Wei and Bing Wang
Fuzzy (restricted) hull operators and fuzzy convex structures on L-sets
Fangfang Zhao and Han-Liang Huang
The relationships among L-ordered hull operators, restricted L-hull operators and strong L-fuzzy convex structures
Bin Pang
L-fuzzifying convex structures as L-convex structures
Wei Yao and Chang-Jie Zhou
A lattice-type duality of lattice-valued fuzzy convex spaces
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