Published Paper
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Inserted: 12 sep 2025
Last Updated: 9 nov 2026

Journal: In: Duran i Lamiel, J., Maione, A. (eds) New Frontiers in Homogenization and Fractional Calculus. Trends in Mathematics. Birkhäuser, Cham
Pages: 25
Year: 2026
Doi: 10.1007/978-3-032-20098-3_3

Abstract:

In this bookchapter we present the fractional Pólya–Szegö principle and its main consequences in the study of nonlocal functional inequalities. In particular, we show how symmetrization methods work also in the fractional setting and yield sharp results such as isoperimetric type inequalities. Further developments including stability issues and generalizations in the anisotropic and the Gaussian setting are also discussed.

Keywords: functional inequalities, Fractional seminorms, Schwarz Rearrangement, Pólya-Szegö principle

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