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Mal’tsev and Lawvere functors. (English) Zbl 1482.18002

Summary: We investigate, at the level of functors, the effect of definitions mimicking those of Mal’tsev and naturally Mal’tsev categories, and show that they give rise to the same kind of characterizations. We give, among others, an application concerning the characterization of the Smith=Huq condition.

MSC:

18A20 Epimorphisms, monomorphisms, special classes of morphisms, null morphisms
08C05 Categories of algebras
18A32 Factorization systems, substructures, quotient structures, congruences, amalgams
18E13 Protomodular categories, semi-abelian categories, Mal’tsev categories
08B10 Congruence modularity, congruence distributivity
Full Text: DOI

References:

[1] Borceux, F.; Bourn, D., Mal’cev, Protomodular, Homological and Semi-Abelian Categories, 566 (2004), Kluwer: Kluwer, Dordrecht · Zbl 1061.18001
[2] Bourn, D., The shift functor and the comprehensive factorization for internal groupoids, Cahiers Top. et Géom. Diff. Cat, 28, 3, 197-226 (1987) · Zbl 0655.18007
[3] Bourn, D., Normalization equivalence, kernel equivalence and affine categories, Lecture Notes in Mathematics, 43-62 (1991) · Zbl 0756.18007
[4] Bourn, D., Mal’cev Categories and fibration of pointed objects, Appl. Categorical Structures, 4, 302-327 (1996) · Zbl 0856.18004
[5] Bourn, D., , n-groupoids from n-truncated simplicial objects as a solution of a universal problem, Journal of pure and applied Algebra, 154, 71-102 (2000) · Zbl 0969.18012
[6] Bourn, D., Normal functors and strong protomodularity, Theory and Applications of Categories, 7, 9, 206-218 (2000) · Zbl 0947.18004
[7] Bourn, D., Abelian groupoids and non-pointed additive categories, Theory and Applications of Categories, 20, 4, 48-73 (2008) · Zbl 1151.18009
[8] Bourn, D., Normality, commutation and suprema in the regular Mal’tsev and protomodular settings, Cahiers Top. et Géom. Diff. Cat, 54, 4, 243-263 (2013) · Zbl 1301.18004
[9] Bourn, D., A structural aspect of the category of quandles, Journal of Knot Theory and its Ramifications, 24, 12, 1550060 (2015) · Zbl 1331.18004
[10] Bourn, D., From Groups to Categorical Algebra (2017), Compact Textbooks in Mathematics: Compact Textbooks in Mathematics, Birkhäuser, Cham · Zbl 1403.18001
[11] Bourn, D.; Gran, M., Centrality and normality in protomodular categories, Theory and Applications of Categories, 9, 8, 151-165 (2002) · Zbl 1004.18004
[12] Bourn, D.; Martins-Ferreira, N.; Van der Linden, T., A characterization of the “Smith is Huq” condition in the pointed Mal’tsev setting, Cahiers Top. et Géom. Diff. Cat, 54, 3, 163-183 (2013) · Zbl 1301.18005
[13] Bourn, D.; Martins-Ferreira, N.; Montoli, A.; Sobral, M., Schreier split epimorphisms between monoids, Semigroup Forum, 88, 3, 739-752 (2014) · Zbl 1306.20067
[14] Carboni, A.; Lambek, J.; Pedicchio, M. C., Diagram chasing in Mal’cev categories, Journal of Pure and Applied Algebra, 69, 271-284 (1990) · Zbl 0722.18005
[15] Carboni, A.; Pedicchio, M. C.; Pirovano, N., Internal graphs and internal groupoids in Mal’tsev categories, Canadian Mathematical Society Conference Proceedings, 13, 97-109 (1992) · Zbl 0791.18005
[16] Hartl, M.; Van der Linden, T., The ternary commutator obstruction for internal crossed modules, Adv. Math, 232, 571-607 (2013) · Zbl 1258.18007
[17] Huq, S. A., Commutator, nilpotency and solvability in categories, Quart. J. Math. Oxford, 19, 2, 363-389 (1968) · Zbl 0165.03301
[18] Johnstone, P. T., Affine categories and naturally Mal’cev categories, Journal of Pure and Applied Algebra, 61, 251-256 (1989) · Zbl 0683.18007
[19] Martins-Ferreira, N.; Van der Linden, T., A note on the “Smith is Huq” condition, Appl. Categorical Structures, 20, 2, 175-197 (2012) · Zbl 1255.18008
[20] Martins-Ferreira, N.; Van der Linden, T., Further remarks on the “Smith is Huq” condition, Appl. Categorical Structures, 23, 527-541 (2015) · Zbl 1327.18016
[21] Rodelo, D.; Van der Linden, T., Higher central extensions via commutators, Theory and Applications of Categories, 27, 9, 189-209 (2012) · Zbl 1252.18031
[22] Smith, J. D.H., Mal’cev varieties, Lecture Notes in Mathematics, 554, 160 (1976) · Zbl 0344.08002
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