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Transversals of families in complete lattices,and torsion in product modules
Authors:George M. Bergman  Fred Galvin
Affiliation:(1) Department of Mathematics, University of California, 94720 Berkeley, CA, U.S.A.;(2) Department of Mathematics, University of Kansas, 66045 Lawrence, KS, U.S.A.
Abstract:Suppose L is a complete lattice containing no copy of the power-set 2ohgr and no uncountable well-ordered chains. It is shown that for any family of nonempty subsets 
$$X_1  subseteq L (i in A)$$
, one can choose elements piisinXi so that orApi majorizes all elements of all but finitely many of the Xi. Ring-theoretic consequences are deduced: for instance, the direct product of a family of torsion modules over a commutative Noetherian integral domain R is torsion if and only if some element of R annihilates all but finitely many of the modules.
Keywords:Primary: 06A23, 13C12, 13E05, 16A63  secondary: 06A12, 08B20, 08B25, 13L05, 16A33
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