Frantisek Machala

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To every subset A of a complete lattice L we assign subsets J(A),M(A) and define join-closed and meet-closed sets in L. Some properties of such sets are proved. Joinand meet-closed sets in power-set lattices are characterized. The connections about join-independent (meet-independent) and join-closed (meet-closed) subsets are also presented in this paper.
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