Geodesic
Universal Varieties Of (0, 1)-Lattices
Canadian journal of mathematics, Tome 42 (1990) no. 3, pp. 470-490

Voir la notice de l'article provenant de la source Cambridge University Press

This article fully characterizes categorically universal varieties of (0, 1)-lattices (that is, lattices with a least element 0 and a greatest element 1 regarded as nullary operations), thereby concluding a series of partial results [3, 5, 8, 10, also 14] which originated with the proof of categorical universality for the variety of all (0, 1)-lattices by Grätzer and Sichler [6].A category C of algebras of a given type is universal if every category of algebras (and equivalently, according to Hedrlín and Pultr [7 or 14], also the category of all graphs) is isomorphic to a full subcategory of C. The universality of C is thus equivalent to the existence of a full embedding Φ : G→C of the category G of all graphs and their compatible mappings into C. When Φ assigns a finite algebra to every finite graph, we say that C is finite-to-finite universal.
DOI : 10.4153/CJM-1990-024-0
Mots-clés : 06B20, 08A35, 18B15 
Goralčík, P.; Koubek, V.; Sichler, J. Universal Varieties Of (0, 1)-Lattices. Canadian journal of mathematics, Tome 42 (1990) no. 3, pp. 470-490. doi: 10.4153/CJM-1990-024-0
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