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Sibirskii Matematicheskii Zhurnal, 2012, Volume 53, Number 5, Pages 1111–1132
(Mi smj2334)
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This article is cited in 9 scientific papers (total in 9 papers)
Lattices of subclasses
M. V. Semenovaab, A. Zamojska-Dzienioc a Sobolev Institute of Mathematics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk
b Novosibirsk State University, Novosibirsk
c Warsaw University of Technology, Warsaw, Poland
Abstract:
We investigate the structure of lattices of subclasses of different types; among those are relative sub(quasi)variety lattices as well as relative (finitary) subprevariety lattices. Among other results, we prove a reduction theorem for (finitary) subprevariety lattices which generalizes a result of V. A. Gorbunov. We also answer a question by D. E. Palchunov and provide some noncomputability properties of lattices of relative subclasses.
Keywords:
axiomatizable class, variety, quasivariety, prevariety, identity, quasi-identity, latticeю.
Received: 02.04.2011
Citation:
M. V. Semenova, A. Zamojska-Dzienio, “Lattices of subclasses”, Sibirsk. Mat. Zh., 53:5 (2012), 1111–1132; Siberian Math. J., 53:5 (2012), 889–905
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https://www.mathnet.ru/eng/smj2334 https://www.mathnet.ru/eng/smj/v53/i5/p1111
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Abstract page: | 329 | Full-text PDF : | 85 | References: | 58 |
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