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arXiv · 2608.03194

Strichartz estimates for quasi-periodic functions on long time intervals: An arithmetic approach

Kotaro Inami
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Abstract

We study long-time Strichartz estimates for the one-dimensional Schrödinger equation with quasi-periodic initial data. For two-frequency data with an algebraic frequency ratio, we observe that the behavior of the linear Schrödinger evolution changes depending on the algebraic degree of the ratio. Making use of this observation, we improve the Strichartz estimates on long time intervals. We also prove an endpoint $L^4$ Strichartz estimate. Our proofs use Roth-type Diophantine inequalities and Vinogradov-type mean value estimates for the Parsell--Vinogradov systems.

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Kotaro Inami. 2026-08-04. Strichartz estimates for quasi-periodic functions on long time intervals: An arithmetic approach. https://arxiv.org/abs/2608.03194

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