Displaying similar documents to “Splitting classes in categories of groups.”

Internal object actions

Francis Borceux, George Z. Janelidze, Gregory Maxwell Kelly (2005)

Commentationes Mathematicae Universitatis Carolinae

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We describe the place, among other known categorical constructions, of the internal object actions involved in the categorical notion of semidirect product, and introduce a new notion of representable action providing a common categorical description for the automorphism group of a group, for the algebra of derivations of a Lie algebra, and for the actor of a crossed module.