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``modular inequality'' by ixionid on 2007-04-16 10:16:14
Maybe the article should mention that in order to show that a lattice is modular it is really only necessary to show that x<=z implies x∨(y∧z)>=(x∨y)∧z since x<=z implies x∨(y∧z)<=(x∨y)∧z for any lattice.
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