Quasi-copulas as linear combinations of copulasDolinar, Gregor (Avtor) Kuzma, Bojan (Avtor) Stopar, Nik (Avtor) quasi-copulascopulaslinear combinationaffine combinationMinkowski normWe 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 written as a finite sum of multiples of copulas, i.e., that are a linear combination of two copulas. This generalizes a recent result of Fernández-Sánchez, Quesada-Molina, and Úbeda-Flores who considered linear combinations of discrete copulas.20242024-02-16 13:16:48Neznano18197UDK: 519.2ISSN pri članku: 0165-0114DOI: 10.1016/j.fss.2023.108821COBISS_ID: 179977731sl