Multivariate Archimedean copulas, d-monotone functions and ℓ1-norm symmetric distributions
多元阿基米德 Copula、d 单调函数与 ℓ1 范数对称分布
It is shown that a necessary and sufficient condition for an Archimedean copula generator to generate a d-dimensional copula is that the generator is a d-monotone function. The class of d-dimensional Archimedean copulas is shown to coincide with the class of survival copulas of d-dimensional ℓ1-norm symmetric distributions that place no point mass at the origin. The d-monotone Archimedean copula generators may be characterized using a little-known integral transform of…