On congruences in direct sums of algebras

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On congruences in direct sums of algebras. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 24 (1983), issue 3, pp. 519-524

MSC: 08A30, 08B25 | MR 730147 | Zbl 0544.08002

References:

[1] G. A. FRASER A. HORN: Congruence relations in direct products. Proc. Amer. Math. Soc. 26 (1970), 390-394. MR 0265258

[2] R. FREESE R. McKENZIE: Commutator. an overview, preprint 1981. MR 0603772

[3] G. GRÄTZER: Universal Algebra. Van Nostrand, New York 1968. MR 0248066

[4] T. K. HU: On equational classes in which congruences on finite products are induced by congruences on their factors. manuscript 1970.

[5] E. NELSON: Filtered products of congruences. Algebra Universalis 8 (1978), 266-268. MR 0465975 | Zbl 0377.08007

[6] P. ZLATOŠ: Unitary congruence adjunctions. disertation 1983 (in Slovak).

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