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On the congruence lattices of unary algebras


Author: Joel Berman
Journal: Proc. Amer. Math. Soc. 36 (1972), 34-38
MSC: Primary 08A15
DOI: https://doi.org/10.1090/S0002-9939-1972-0309833-6
MathSciNet review: 0309833
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Abstract: Characterizations of those unary algebras whose congruence lattices are semimodular or atomic are obtained. Combining these results gives necessary and sufficient conditions for a unary algebra to have a geometric congruence lattice.


References [Enhancements On Off] (What's this?)

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Additional Information

DOI: https://doi.org/10.1090/S0002-9939-1972-0309833-6
Keywords: Congruence relations, congruence lattices, unary algebras, universal algebras, semimodular lattices, atomic lattices, matroid lattices, geometric lattices, sequential machines
Article copyright: © Copyright 1972 American Mathematical Society

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