2 papers
math.ST2026
Random discrete copulas
Damjana Kokol Bukovšek, Blaž Mojškerc, Nik Stopar
We introduce the notion of a bivariate random discrete copula on an equidistant mesh and explore its stochastic properties. A random discrete copula is a discrete random field, hen…
math.ST2023
Quasi-copulas as linear combinations of copulas
Gregor Dolinar, Bojan Kuzma, Nik Stopar
We prove that every quasi-copula can be written as a uniformly converging infinite sum of multiples of copulas. Furthermore, we characterize those quasi-copulas which can be writte…