Geodesic
The class of bounded lattices is not axiomatizable
Algebra i logika, Tome 55 (2016) no. 4, pp. 493-497
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We prove that the class of bounded (lower bounded, upper bounded) lattices is not closed under ultraproducts, thereby solving an open problem.
Keywords: axiomatizable class, lower bounded lattice, free lattice
Mots-clés : ultraproduct. 
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M. V. Schwidefsky. The class of bounded lattices is not axiomatizable. Algebra i logika, Tome 55 (2016) no. 4, pp. 493-497. http://geodesic.mathdoc.fr/item/AL_2016_55_4_a7/

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