semi-abelian category

Prof. Giuseppe Metere (University of Milano) will give a seminar on Wednesday 9 April 2025 at 11:30 in Sala Riunioni, DipMat. Title: Towards a notion of unital action.  Abstract: A group action of a group  $B$  on a group  $X$  is usually described as a $B$-group  $X$ , i.e., through a set-theoretic map: Read more