5 papers
Sharp Higher Integrability Theory, Part I: The -norm of the Beurling--Ahlfors transform
Andrea Agazzi, Kari Astala, Giuseppe Bruno +18
We confirm a conjecture posed by T. Iwaniec in 1982: the norm of the Beurling--Ahlfors transform is if , and if .
A solution to Morrey's problem in
Gabriele Cassese
We construct, for any exponent , -homogeneous rank-one convex integrands that are nowhere quasiconvex when is…
Korn's inequality from the viewpoint of calculus of variations
Gabriele Cassese
We study the best possible constants in Korn-type inequalities and their connection with Morrey's problem in the calculus of variations. We adapt techniques from the analysis of th…
Martingales, laminates and minimal Korn inequalities
Gabriele Cassese
Korn's inequalities show that the -norm of can be controlled by the -norm of , which only has components. In [J. Math. Pures…
On the regularity of Fourier interpolation formulas
Gabriele Cassese, João P. G. Ramos
By applying new functional analysis tools in the framework of Fourier interpolation formulas, such as sc-Fredholm operators and Schauder frames, we are able to improve and refine s…