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arxiv: 2305.00125 · v2 · pith:W4LK3OW7 · submitted 2023-04-28 · math.CA

Small cap decoupling for the parabola with logarithmic constant

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classification math.CA
keywords decouplingsmallcontrolleddemonstratemathbbparabolapowersuitable
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We note that the subpolynomial factor for the $\ell^qL^p$ small cap decoupling constants for the truncated parabola $\mathbb{P}^1=\{(t,t^2):|t|\leq 1\}$ may be controlled by a suitable power of $\log R$. This is achieved by considering a suitable amplitude-dependent wave envelope estimate, as was introduced in a recent paper of Guth and Maldague to demonstrate a small cap decoupling for the $(2+1)$ cone; we demonstrate that the version for $\mathbb{P}^1$ may be taken with a loss controlled by a power of $\log R$ as well.

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