Categorical aspects of congruence distributivity
 
 
Description: 

We give new characterisations of regular Mal'tsev categories with distributive lattice of equivalence relations through variations of the so-called Triangular Lemma and Trapezoid Lemma in universal algebra. We then give new characterisations of equivalence distributive Goursat categories (which extend 3-permutable varieties) through variations of the Triangular and Trapezoid Lemmas involving reflexive and positive relations.


This is a joint work with Marino Gran and Diana Rodelo.

Date:  2020-01-31
Start Time:   15:00
Speaker:  Idriss Tchoffo Nguefeu (UCLouvain, Belgium)
Institution:  Université catholique de Louvain
Place:  Sala 5.5
Research Groups: -Algebra, Logic and Topology
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