
A great deal of work has been done during the last 45 years concerning the unimodality of one-dimensional infinitely divisible distribution functions. Recently, a few results have been obtained for multivariate infinitely divisible distribution functions. The purpose of this paper is to give a survey of previous work and to discuss some unsolved problems.
Levy Spectral Function, Infinitely divisible distributions; stable distributions, Unimodality, Infinitely Divisible Dstribution Functions
Levy Spectral Function, Infinitely divisible distributions; stable distributions, Unimodality, Infinitely Divisible Dstribution Functions
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