The one-dimensional Mizohata–Takeuchi conjecture for convex curves

Let Γ\Gamma be a convex C2C^2 function on [0,1][0,1], let EΓE_\Gamma be its extension operator, and let ω:BR[0,)\omega:B_R\to[0,\infty) be a one-dimensional weight, meaning

ω(B(y,r))r\omega(B(y,r))\le r

for every ball of radius rr centered at yy, with 1rR1\le r\le R. One-dimensional Mizohata–Takeuchi conjecture. Then

BREΓg2ωϵRϵsupTω(T)12g22,\int_{B_R}|E_\Gamma g|^2\omega\lesssim_\epsilon R^\epsilon\sup_T\omega(T)^{\frac12}\|g\|_2^2,

where TT ranges over R×R12R\times R^{\frac12} tubes. The paper explicitly says that this conjecture is false for general C2C^2 convex curves, so the claim is refuted in that stated generality.

Sources & referencesView supporting material

Primary source

Xuerui Yang, “Some Mizohata-Takeuchi-type estimate for exponential sums”, arXiv:2511.00841 (2025).

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