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Results tagged with congruences
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user 490477
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Reference request for a proof of the Mal'cev condition for congruence $n$-permutability
By a theorem of Hagemann and Mitschke, a condition (A) that a variety $\mathcal{V}$ is congruence $n$-permutable, is equivalent to a condition (B) that there exist ternary terms $p_1,\dots,p_{n-1}$ su …
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