The duality between the anti-exchange closure operators and the path independent choice operators on a finite
set
Résumé.
Ce papier montre que la correspondance entre les fermetures anti-échanges et les fonctions de choix
chemin-indépendantes, découvertes par Koshevoy ([18]) et, Johnson et Dean ([15],[16]), est en faite une
dualité entre deux demi-treillis. Cette dualité permet d'obtenir tous les (et notamment de nouveaux)
résultats sur les fermetures anti-échanges (et inversement).
Abstract.
In this paper, we show that the correspondence discovered by Koshevoy ([18]) and Johnson and Dean ([15],[16])
between anti-exchange closure operators and path independent choice operators is a duality between two
semilattices of such operators. Then we use this duality to obtain results concerning the "ordinal"
representations of path independent choice functions from the theory of anti-exchange closure operators.
JEL Classification :
90A, 06D.
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