Congruence coherent symmetric extended de Morgan algebras

Studia Logica 87 (1):51 - 63 (2007)
An algebra A is said to be congruence coherent if every subalgebra of A that contains a class of some congruence on A is a union of -classes. This property has been investigated in several varieties of lattice-based algebras. These include, for example, de Morgan algebras, p-algebras, double p-algebras, and double MS-algebras. Here we determine precisely when the property holds in the class of symmetric extended de Morgan algebras.
Keywords Philosophy   Computational Linguistics   Mathematical Logic and Foundations   Logic
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