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How to centralize and normalize quandle extensions
Description:  During this talk, we will study different classes of quandle homomorphisms defined with respect to a fundamental reflection of the category of quandles into its full subcategory of trivial quandles. I will recall the notion of a central extension and of a normal extension coming from categorical Galois theory. After having given their characterizations in the context of the previous adjunction, I will explain how one can centralize (or normalize) any extension of quandles, that is how one can find a left adjoint to the inclusion of the category of central (or of normal) extensions into the category of extensions. This is joint work with V. Even and A. Montoli.
Date:  2016-12-13
Start Time:   14:30
Speaker:  Mathieu Duckerts-Antoine (CMUC)
Institution:  CMUC, Univ. Coimbra
Place:  Room 5.5
Research Groups: -Algebra, Logic and Topology
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