HSP-type Characterization of Strong Equational Classes of Partial Algebras

Studia Logica 93 (1):41-65 (2009)
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Abstract

This paper presents the first purely algebraic characterization of classes of partial algebras definable by a set of strong equations. This result was posible due to new tools such as invariant congruences, i.e. a generalization of the notion of a fully invariant congruence, and extension of algebras, specific for strong equations.

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10.1007/s11225-009-9208-z

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