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Orthogonal Families of Sets
Published online by Cambridge University Press: 20 November 2018
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In this note we answer in the affirmative the following question.
If S is a finite family of sets such that each subset of a member of S also belongs to S, is it possible to arrange the sets in pairs so that the first member of the pair is contained in the complement of the second member?
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- Copyright © Canadian Mathematical Society 1971
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