Geodesic
Corelations are the prop for extraspecial commutative Frobenius monoids
Theory and applications of categories, Tome 32 (2017), pp. 380-395 Cet article a éte moissonné depuis la source Theory and Applications of Categories website

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Just as binary relations between sets may be understood as jointly monic spans, so too may equivalence relations on the disjoint union of sets be understood as jointly epic cospans. With the ensuing notion of composition inherited from the pushout of cospans, we call these equivalence relations corelations. We define the category of corelations between finite sets and prove that it is equivalent to the prop for extraspecial commutative Frobenius monoids. Dually, we show that the category of relations is equivalent to the prop for special commutative bimonoids. Throughout, we emphasise how corelations model interconnection.

Publié le :
Classification : 18C10, 18D10
Keywords: corelation, extra law, Frobenius monoid, prop, PROP 
@article{TAC_2017_32_a10,
     author = {Brandon Coya and Brendan Fong},
     title = {Corelations are the prop for extraspecial commutative {Frobenius} monoids},
     journal = {Theory and applications of categories},
     pages = {380--395},
     year = {2017},
     volume = {32},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2017_32_a10/}
}
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Brandon Coya; Brendan Fong. Corelations are the prop for extraspecial commutative Frobenius monoids. Theory and applications of categories, Tome 32 (2017), pp. 380-395. http://geodesic.mathdoc.fr/item/TAC_2017_32_a10/