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Article

MSC: 37L05, 60E15, 62N05
Keywords:
copulas; semi-copulas; evolution of ageing and dependence; action of a semigroup
Summary:
In previous papers, evolution of dependence and ageing, for vectors of non-negative random variables, have been separately considered. Some analogies between the two evolutions emerge however in those studies. In the present paper, we propose a unified approach, based on semigroup arguments, explaining the origin of such analogies and relations among properties of stochastic dependence and ageing.
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