Published online by Cambridge University Press: 26 January 2019
In this paper, we look for the weight functions (say g) that admit the following generalized Hardy-Rellich type inequality:
$$\int_\Omega g (x)u^2 dx \les C\int_\Omega \vert \Delta u \vert ^2 dx,\quad \forall u\in {\rm {\cal D}}_0^{2,2} (\Omega ),$$
${\cal D}_0^{2,2} $ into certain Lorentz-Zygmund spaces proved by Hansson and later by Brezis and Wainger.