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This tag is used if a reference is needed in a paper or textbook on a specific result.
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Reference request for a proof of the fact that every congruence-permutable variety is semide...
Given an algebra $\mathbf{A}$, a pair of congruences
$ \alpha ,\beta \in Con(\mathbf {A})$ are said to permute when
$ \alpha \circ \beta =\beta \circ \alpha$, and an algebra
$\mathbf{A}$ is called con …