On Caffarelli-Kohn-Nirenberg-type Inequalities for the Weighted Biharmonic Operator in Cones

We investigate Caffarelli-Kohn-Nirenberg type inequalities for the weighted biharmonic operator in cones, both under Navier and Dirichlet boundary conditions. Moreover, we study existence and qualitative properties of extremal functions. In particular, we show that in some cases extremal functions do change sign; when the domain is the whole space, we prove some breaking symmetry phenomena.