Manuel Úbeda-Flores

collaborators

15 papers

math.ST2026

Concordance, symmetrization and non-exchangeability for bivariate copulas

Ãvaro RodrÃguez-GarcÃa, Manuel Ãbeda-Flores

We study the relationship between measures of non-exchangeability $I^¼_{p}$ ( $p \in [1, + \infty]$ ), in the sense of Durante et al. (2010), and classical dependence functionals for bivari…

math.ST2026

New Baire category results for stochastic orders on bivariate copulas

MarÃa del Rosario RodrÃguez-GriÃ±olo, Manuel Ãbeda-Flores

In the sense of Baire categories, we prove that the set of pairs of bivariate copulas that are comparable -- in either direction -- under the increasing convex order is nowhere den…

math.ST2026

Characterizing Schur-concave commutative copulas as the closure of associative ones

Manuel Ãbeda-Flores

Let $C_{a}$ denote the class of associative copulas, and let $C_{a}$ be the closure, in the uniform metric $d_{\infty}$ , of the convex hull of $\mathcal{C}…

math.ST2026

Quantitative analysis of non-exchangeability in bivariate copulas: Sharp bounds, statistical tests and mixing constructions

Manuel Ãbeda-Flores

This paper studies the degree to which a bivariate copula fails to be symmetric under coordinate permutation, a property known as non-exchangeability. Working within an axiomatic f…

math.ST2026

The W-footrule coefficient: A copula-based measure of countermonotonicity

Enrique de Amo, David GarcÃa-FernÃ¡ndez, Manuel Ãbeda-Flores

We introduce the $W$ -footrule coefficient $I^¦_{C}$ , a copula-based coefficient of negative association defined as the $L^{1}$ -distance to the countermonotonic copula $W$ . We prove that…

math.ST2026

Convex lineability in copula and quasi-copula sets

Enrique de Amo, Juan FernÃ¡ndez-SÃ¡nchez, David GarcÃa-FernÃ¡ndez +1

In this paper, we investigate several subsets of $n$ -copulas and $n$ -quasi-copulas from the perspective of convex-lineability and the recently introduced concept of convex-spaceabi…