A method for inference in approximate reasoning based on interval-valued fuzzy sets
Fuzzy Sets and Systems
I-v fuzzy relations and Sanchez's approach for medical diagnosis
Fuzzy Sets and Systems
Rosenfeld's fuzzy subgroups with interval-valued membership functions
Fuzzy Sets and Systems
The homomorphic image of a fuzzy subgroup is always a fuzzy subgroup
Fuzzy Sets and Systems
Fuzzy Sets and Systems
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We define level subsets of an i-v fuzzy subset of a set, level subgroups of a group and prove some propositions about level subgroups.