Lesnik, Karol; Roskovec, Tomáš; Soudský, Filip
(Springer, 2023)
We prove the optimality of the Gagliardo-Nirenberg inequality: parallel to del u parallel to X less than or similar to parallel to del(2)u parallel to(1\2)(Y)parallel to u parallel to(1\2)(Z), where Y and Z are rearrangement ...