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Showing 1 to 1 of 1 for “"primale Algebren"”.
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Varieties and Clones of Relational Structures
We present an axiomatization of relational varieties, i.e., classes of relational structures closed under formation of products and retracts, by a certain class of first-order sentences. We apply this result to categorically equivalent algebras and primal algebras. We consider the relational …