Percorrer por autor "Ursini, A."
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- What is an ideal a zero-class of?Publication . Martins-Ferreira, Nelson; Montoli, A.; Ursini, A.; Linden, T. Van derWe characterise, in pointed regular categories, the ideals as the zero-classes of surjective relations. Moreover, we study a variation of the Smith is Huq condition: two surjective left split relations commute as soon as their zero-classes commute.