Pseudogroupoids and commutators.
Janelidze, George, Pedicchio, M.Cristina (2001)
Theory and Applications of Categories [electronic only]
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Janelidze, George, Pedicchio, M.Cristina (2001)
Theory and Applications of Categories [electronic only]
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Czédli, G. (1994)
Acta Mathematica Universitatis Comenianae. New Series
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Ivan Chajda, Gábor Czédli, Eszter K. Horváth (2003)
Mathematica Slovaca
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Jaromír Duda (1992)
Mathematica Bohemica
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We give Mal’cev conditions for varieties 4V4 whose congruences on the product , are determined by their restrictions on the axes in .
Ivan Chajda (1988)
Mathematica Slovaca
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Gábor Czédli (1991)
Archivum Mathematicum
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Ivan Chajda, Günther Eigenthaler (2001)
Discussiones Mathematicae - General Algebra and Applications
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It is well known that every congruence regular variety is n-permutable (in the sense of [9]) for some n ≥ 2. For the explicit proof see e.g. [2]. The connections between this n and Mal'cev type characterizations of congruence regularity were studied by G.D. Barbour and J.G. Raftery [1]. The concept of local congruence regularity was introduced in [3]. A common generalization of congruence regularity and local congruence regularity was given in [6] under the name "dual congruence regularity...
Don Pigozzi (1981)
Colloquium Mathematicae
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