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Keywords:
algebra; homomorphism; subalgebra; direct product; variety; mono-unary algebra
Summary:
Mono-unary algebras may be used to construct homomorphisms, subalgebras, and direct products of algebras of an arbitrary type.
References:
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[6] M. Novotný: Homomorphisms of algebras. Czechoslovak Math.  J. 52(127) (2002), 345–364. MR 1905442
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