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Whaley's Theorem for Finite Lattices
被引:0
|作者:
Ralph Freese
Jennifer Hyndman
J. B. Nation
机构:
[1] University of Hawaii,Department of Mathematics
来源:
关键词:
lattice;
ordered set;
sublattice;
maximal sublattice;
D O I:
10.1023/B:ORDE.0000026464.36426.09
中图分类号:
学科分类号:
摘要:
Whaley's Theorem on the existence of large proper sublattices of infinite lattices is extended to ordered sets and finite lattices. As a corollary it is shown that every finite lattice L with |L|≥3 contains a proper sublattice S with |S|≥|L|1/3. It is also shown that that every finite modular lattice L with |L|≥3 contains a proper sublattice S with |S|≥|L|1/2, and every finite distributive lattice L with |L|≥4 contains a proper sublattice S with |S|≥3/4|L|.
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页码:223 / 228
页数:5
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