We obtain a 3-fold Selberg integral formula.
As a consequence we are able to compute the explicit value of the
sharp constant in a trilinear fractional integral inequality due
to Beckner.
Authors
Loukas Grafakos
Dipartimento di Matematica e Applicazioni Universita di Milano - Bicocca Via Bicocca degli Arcimboldi, 8 20126 Milano Italy