empty set

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Related to Empty subset: Proper subset

empty set

Mathematics
The set that has no members or elements.
References in periodicals archive ?
Apr](A), then above definition is definition of fuzzy sub algebra of Hilbert algebra, and so a non empty subset A of X is a sub algebra of X if and only if the characteristic function of A is a fuzzy sub algebra of X.
i] space and A be any non empty subset of X then A is vg-[C.
4] A collection G of non empty subsets of a space X is called a grill on X