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Keywords:
copula; quasi-copula; symmetry; opposite diagonal
copula; quasi-copula; symmetry; opposite diagonal
Summary:
A two-place function measuring the degree of non-symmetry for (quasi-)co\-pu\-las is considered. We construct copulas which are maximally non-symmetric on certain subsets of the unit square. It is shown that there is no copula (and no quasi-copula) which is maximally non-symmetric on the whole unit square.
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