Fibration of points and congruence modularity
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Mal’cev varieties, or more generally Mal’cev categories, have been characterized by a property of the fibres of their fibration of points. In the same way, it is shown here that congruence modular varieties, and more generally Gumm categories, are also characterized by a property of these fibres.
Mathematics Subject Classification (2000).08B10 08A30 18C10 03C05
Key words and phrases.Congruence modular variety shifting lemma unital and Mal’cev category fibration of points
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