Left-Modular Elements of Lattices
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Shu-Chung Liu; Bruce E. Sagan
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Article
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2000
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Elsevier Science
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English
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Left-modularity is a concept that generalizes the notion of modularity in lattice theory. In this paper, we give a characterization of left-modular elements and derive two formulae for the characteristic polynomial, /, of a lattice with such an element, one of which generalizes Stanley's theorem [6]