2 problems

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Ubeda-Flores conjecture on minimal volumes of quasi-copula boxes
Fix $d\ge 2$ . For a $d$ -dimensional quasi-copula $Q$ and a $d$ -box $\mathcal B$ , let $V_Q(\mathcal B)$ denote the associated $Q$ -volume. The conjecture concerns the minimum of…
Conjectureopencopulas linear-programming quasi-copulasarXiv posted 2 days ago
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The quasi-copula patching conjecture
Quasi-copula patching conjecture. Under the condition that the volume $V$ of $R$ is nonzero, the desired patch is equal to
Conjectureopencopulas multivariate-statistics quasi-copulasarXiv posted 2 days ago

Ubeda-Flores conjecture on minimal volumes of quasi-copula boxes