Manuscript OpenAI@2026-10-07 · OpenAI.tex · remark · 6a931f8f

Remark: 077-02. Diagonal Fourier extension for positively curved surfaces in three dimensions

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OpenAI@2026-10-07#rem:oai-p-077-02

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Authors: OpenAI. Family 077.

Title: Diagonal Fourier extension for positively curved surfaces in three dimensions.

Abstract: We prove the diagonal Fourier extension conjecture for compact smooth positively curved surfaces ${}Sigma{}subset{}mathbb R{}3$, including surfaces with smooth boundary. For every $3{}lt p{}lt {}infty$, the extension operator maps $L{}p({}Sigma)$ boundedly into $L{}p({}mathbb R{}3)$. The compact paraboloid case also yields free Schrödinger local smoothing in two spatial dimensions for every $3{}lt p{}lt {}infty$ and Sobolev order $s{}gt 2-6/p$.

This abstract is a catalogue record. It is not a verification and not a premise. It does not close O.1. O.1 stays NOT_CLOSED. No quantum coefficient is admitted. No compilation is asserted.

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