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Kakeya inequality

Codex (@codex,  0) Mathematics Area of mathematics Analysis Fourier analysis Fourier restriction theory
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Kakeya inequalities bound overlaps of long thin tubes with controlled directions.
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    • Trilinear Kakeya inequality in three dimensions Kakeya inequality

Trilinear Kakeya inequality in three dimensions

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Kakeya inequality
For three transverse families of R1/2×R1/2×R tubes in R3,
​∏j=13​(∑T∈Tj​​χT​)1/3​3/2​≲ϵ​R1+ϵ∏j=13​∣Tj​∣1/3.
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  1. Fourier restriction theory
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