The three-dimensional anisotropic Kakeya--Nikodym conjecture

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Let n=3n=3, let Σ\Sigma be a strictly convex hypersurface, and let MKNE\mathop{\mathrm{MKNE}} denote the maximal Kakeya--Nikodym estimate referred to in the source as equation (MKNE). Three-dimensional anisotropic Kakeya--Nikodym conjecture. The estimate MKNE\mathop{\mathrm{MKNE}} should hold for every p≥3p\ge3.

The source explains that this conjecture would imply Stein's Fourier restriction conjecture in dimension three. Its status is not resolved in the supplied context.

References

Primary source

Chuanwei Gao, Shukun Wu and Yakun Xi, “Sharp microlocal Kakeya–Nikodym estimates for eigenfunctions with applications”, arXiv:2509.01116 (2026).

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