6 citations · 15 across the 6 of their papers we have counts for
6 papers
Total positivity and dependence of order statistics
Enrique de Amo, José Juan Quesada-Molina, Manuel Úbeda-Flores
In this comprehensive study, we delve deeply into the concept of multivariate total positivity, defining it in accordance with a direction. We rigorously explore numerous salient p…
Supports of quasi-copulas
Juan Fernández-Sánchez, José Juan Quesada-Molina, Manuel Úbeda-Flores
It is known that for every there is a copula whose support is a self-similar fractal set with Hausdorff -- and box-counting -- dimension . In this paper we provide s…
Extreme semilinear copulas
Fabrizio Durante, Juan Fernández-Sánchez, Manuel Úbeda-Flores
We study the extreme points (in the Krein-Milman sense) of the class of semilinear copulas and provide their characterization. Related results into the more general setting of conj…
Extreme values of the mass distribution associated with a tetravariate quasi-copula
Manuel Úbeda-Flores
In this note we study the extremes of the mass distribution associated with a tetravariate quasi-copula and compare our results with the bi- and trivariate cases, showing the impor…
Best-possible bounds on the set of copulas with a given value of Gini's gamma
Manuel Úbeda-Flores
In this note, pointwise best-possible (lower and upper) bounds on the set of copulas with a given value of the Gini's gamma coefficient are established. It is shown that, unlike th…
Modeling directional monotonicity with copulas
Enrique de Amo, David García-Fernández, José Juan Quesada-Molina +1
The purpose of this paper is to characterize the concept of monotonicity according to a direction related to a set of n random variables in terms of its associated n-copula C. We s…