A note on the logic of signed equations

Studia Logica 41 (1):75 - 81 (1982)
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A signed -equation is an expression of the form t t or t t, where t and t are -terms (for some ranked set ). We characterize those classes of -algebras which are models of a set of signed -equations. Further we consider the problem of finding a complete deductive system analogous to equational logic for the logical consequence operation restricted to signed equations.



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Universal Algebra.George Grätzer - 1982 - Studia Logica 41 (4):430-431.

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