On congruences of the lattices
Ivan Vlček (1977)
Commentationes Mathematicae Universitatis Carolinae
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Ivan Vlček (1977)
Commentationes Mathematicae Universitatis Carolinae
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William H. Cornish (1981)
Commentationes Mathematicae Universitatis Carolinae
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Jiří Tůma (1985)
Commentationes Mathematicae Universitatis Carolinae
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Luc Vrancken-Mawet (1984)
Commentationes Mathematicae Universitatis Carolinae
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Ivo Düntsch (1993)
Banach Center Publications
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0. Introduction. Besides being of intrinsic interest, cylindric (semi-) lattices arise naturally from the study of dependencies in relational databases; the polynomials on a cylindric semilattice are closely related to the queries obtainable from project-join mappings on a relational database (cf. [D] for references). This note is intended to initiate the study of these structures, and only a few, rather basic results will be given. Some problems at the end will hopefully stimulate further...