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math.RA2025
Semilattices with a congruence
Paolo Lipparini
A specialization semilattice is a semilattice together with a coarser preorder satisfying a compatibility condition. We show that the category of specialization semilattices is iso…
math.RA2024
A short way to directed Jónsson terms
Paolo Lipparini
We show that a variety with Jónsson terms has directed Jónsson terms , for the same value of the indices, solving a problem raised by K…