Geodesic
On Categories of Relations
Publications de l'Institut Mathématique, _N_S_45 (1989) no. 59, p. 33 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

This paper is concerned with relations in categories with pullbacks, studied by Kawahara in [3], and with a kind of congruences that may be considered in the corresponding category of spans. Also, having mind G. Conte's results about symmetrizations of categories [2], some categories of relations are compared.
Classification : 18B99 08A08 18D99
Keywords: category with pullbacks, functor-category, natural transformation, symmetrizations of categories, involution. 
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     author = {Mara Alagi\'c},
     title = {On {Categories} of {Relations}},
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     number = {59},
     year = {1989},
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Mara Alagić. On Categories of Relations. Publications de l'Institut Mathématique, _N_S_45 (1989) no. 59, p. 33 . http://geodesic.mathdoc.fr/item/PIM_1989_N_S_45_59_a5/