Free infinite divisibility for generalized power
distributions with free Poisson term
Junki Morishita
Yuki Ueda
Abstract:
We study free infinite divisibility (FID) for a class of generalized power distributions
with free Poisson term by using complex analytic methods and free cumulants. In particular,
we prove that (i) if \(X\) follows the free generalized
inverse Gaussian distribution, then the distribution of \(X^r\)
is FID when \(|r|\ge1\); (ii) if \(S\)
follows the standard semicircle law and \(u> 2\), then the distribution
of \((S+u)^r\) is FID when \(r\le -1\); (iii)
if \(B_p\) follows the beta distribution
with parameters \(p\) and \(3/2\),
then (iii-a) the distribution of \(B_p^r\) is FID when \(|r|\ge 1\)
and \(0<p\le 1/2\); (iii-b) the distribution of \(B_p^r\) is FID
when \(r\le -1\) and \(p>1/2\).