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Coherent and ideal actions in ideally exact categories
Manuel Mancini, Giuseppe Metere, Federica Piazza
https://arxiv.org/abs/2507.06124 https://

Coherent and ideal actions in ideally exact categories
In the context of ideally exact categories, we introduce the notions of internal coherent action and internal ideal action that generalize different aspects of unital actions of rings and algebras. We prove that every ideal action is coherent, and that the converse statement holds in some relevant ideally exact contexts. Furthermore, a connection with G. Janelidze's notion of semidirect product in ideally exact categories is analyzed.