<p>We answer the question in the title. In the process, we correct an error in our AMS Memoir <i>The Shape of Congruence Lattices</i>.</p>

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What is the weakest idempotent Maltsev condition that implies that abelian tolerances generate abelian congruences?

  • Keith A. Kearnes,
  • Emil W. Kiss

摘要

We answer the question in the title. In the process, we correct an error in our AMS Memoir The Shape of Congruence Lattices.