Geodesic
On Categories of Relations
Publications de l'Institut Mathématique, _N_S_45 (1989) no. 59, p. 33
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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},
     language = {en},
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}
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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/