Probability Theory
The lattice-theoretic structure of sets of bivariate copulas and quasi-copulas
[La structure réseau-théorique des ensembles de copules et quasi-copules bivariées]
Comptes Rendus. Mathématique, Tome 341 (2005) no. 9, pp. 583-586.

Dans cette Note, nous montrons que l'ensemble des quasi-copules est un treillis complet, qui est isomorphe au sens de l'ordre à la complétion de Dedekind–MacNeille de l'ensemble des copules. En conséquence, tout ensemble de copules qui possède une propriété statistique particulière est assuré de réaliser les meilleures bornes ponctuelles parmi l'ensemble des quasi-copules.

In this Note we show that the set of quasi-copulas is a complete lattice, which is order-isomorphic to the Dedekind–MacNeille completion of the set of copulas. Consequently, any set of copulas sharing a particular statistical property is guaranteed to have pointwise best-possible bounds within the set of quasi-copulas.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crma.2005.09.026
Nelsen, Roger B. 1 ; Úbeda Flores, Manuel 2

1 Department of Mathematical Sciences, Lewis & Clark College, 0615 S.W. Palatine Hill Road, Portland, OR 97219, USA
2 Departamento de Estadística y Matemática Aplicada, Universidad de Almería, Carretera de Sacramento s/n, La Cañada de San Urbano, 04120 Almería, Spain
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Nelsen, Roger B.; Úbeda Flores, Manuel. The lattice-theoretic structure of sets of bivariate copulas and quasi-copulas. Comptes Rendus. Mathématique, Tome 341 (2005) no. 9, pp. 583-586. doi : 10.1016/j.crma.2005.09.026. http://archive.numdam.org/articles/10.1016/j.crma.2005.09.026/

[1] Alsina, C.; Nelsen, R.B.; Schweizer, B. On the characterization of a class of binary operations on distribution functions, Statist. Probab. Lett., Volume 17 (1993), pp. 85-89

[2] Davey, B.A.; Priestley, H.A. Introduction to Lattices and Order, Cambridge University Press, Cambridge, 2002

[3] Genest, C.; Quesada Molina, J.J.; Rodríguez Lallena, J.A.; Sempi, C. A characterization of quasi-copulas, J. Multivariate Anal., Volume 69 (1999), pp. 193-205

[4] Nelsen, R.B. An Introduction to Copulas, Springer-Verlag, Berlin/New York, 1999

[5] Nelsen, R.B.; Quesada Molina, J.J.; Rodríguez Lallena, J.A.; Úbeda Flores, M. Best-possible bounds on sets of bivariate distribution functions, J. Multivariate Anal., Volume 90 (2004), pp. 348-358

[6] Sklar, A. Fonctions de répartition à n dimensions et leurs marges, Publ. Inst. Statist. Univ. Paris, Volume 8 (1959), pp. 229-231

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