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Congruence Coherent Symmetrie Extended de Morgan Algebras
T. S. Blyth and Jie Fang
Studia Logica: An International Journal for Symbolic Logic
Vol. 87, No. 1 (Oct., 2007), pp. 51-63
Published by: Springer
Stable URL: http://www.jstor.org/stable/40210798
Page Count: 13
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An algebra A is said to be congruence coherent if every subalgebra of A that contains a class of some congruence $\vartheta $ on A is a union of $\vartheta $ -classes. This property has been investigated in several varieties of lattice-based algebras. These include, for example, de Morgan algebras, -algebras, double -algebras, and double MS-algebras. Here we determine precisely when the property holds in the class of Symmetrie extended de Morgan algebras.
Studia Logica: An International Journal for Symbolic Logic © 2007 Springer