Varieties of Tense Algebras

Abstract

A b s t r a c t. The paper has two parts preceded by quite comprehensive preliminaries. In the first part it is shown that a subvariety of the variety T of all tense algebras is discriminator if and only if it is semisimple. The variety T turns out to be the join of an increasing chain of varieties D n , which are discriminator varieties. The argument… (More)

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