Abstract
The concept of quasi-coincidence of a fuzzy interval value with an interval valued fuzzy set is considered. In fact, this is a generalization of quasi-coincidence of a fuzzy point with a fuzzy set. By using this new idea, the notion of interval valued (∈, ∈ ∨q)-fuzzy filters in BL-algebras which is a generalization of fuzzy filters of BL-algebras, is defined, and related properties are investigated. In particular, the concept of a fuzzy subgroup with thresholds is extended to the concept of an interval valued fuzzy filter with thresholds in BL-algebras.
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Supported by the National Natural Science Foundation of China (60474022) and a grant of the Key Science Foundation of Education Committee of Hubei Province (D200729003).
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Ma, X., Zhan, J. & Xu, Y. Generalized fuzzy filters of BL-algebras. Appl. Math.- J. Chin. Univ. 22, 490–496 (2007). https://doi.org/10.1007/s11766-007-0416-x
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DOI: https://doi.org/10.1007/s11766-007-0416-x