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arXiv · 2512.10620

Asymptotic analysis of fractional Sobolev spaces on thin films in the low-integrability regime

Andrea Braides·Andrea Pinamonti·Margherita Solci
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Abstract

We study the behaviour of fractional Sobolev spaces $H^s(Ω_\varepsilon)$ with $s\in(0,1/2)$ defined on ``thin films'' $Ω_\varepsilon=ω\times (0,\varepsilon)$ in $\mathbb R^d$, and prove that they tend to the space $H^{s+\frac12}(ω)$ as $\varepsilon\to 0$. This is made precise by using a notion of dimension-reduction convergence, with respect to which suitably scaled Gagliardo seminorms define equicoercive functionals. Asymptotic results are proved for $s\to 0^+$ and $s\to 1/2^-$.

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Andrea Braides, Andrea Pinamonti, Margherita Solci. 2026-03-17. Asymptotic analysis of fractional Sobolev spaces on thin films in the low-integrability regime. https://arxiv.org/abs/2512.10620

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