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Seminario / DUVIEUSART

Mercoledi' 25  ottobre 2017, alle ore 11.30, in Aula Dottorato,

Il Dott. Arnaud  DUVIEUSART, Universita' di Louvain-La-Neuve,

terra' un seminario dal titolo:

« Higher commutator conditions for extensions in Mal’tsev categories ».

Abstract. We define a natural Galois structure on the category of pairs of equivalence relations in an exact Mal'tsev category, and characterize central and double central extensions in terms of higher commutator conditions. These results generalize both the ones related to the abelianization functor in exact Mal'tsev categories, and the ones corresponding to the reflection from the category of internal reflexive graphs to the one of internal groupoids.​

18 ottobre 2017
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