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On rough set and fuzzy sublattice |
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| Authors: | Ali Akbar Estaji Somayeh Khodaii |
| Affiliation: | Department of Mathematics, Sabzevar Tarbiat Moallem University, Sabzevar, Iran |
| Abstract: | Let L be a lattice with the least element 0 and the greatest element 1 and let θ be a full congruence relation on L. In this paper, the notion of θ-upper and θ-lower approximations of a fuzzy subset of L is introduced and some important properties will be studied. |
| Keywords: | Rough set Upper and lower approximations Lattice Fuzzy sublattice Fuzzy prime ideal |
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