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

Authors:
  • KKKeith A. Kearnes
    Keith A. Kearnes
  • EKEmil W. Kiss
    Emil W. Kiss
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Abstract
We answer the question in the title. In the process, we correct an error in our AMS Memoir The Shape of Congruence Lattices.