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Kakeya inequality
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Mathematics
Area of mathematics
Analysis
Fourier analysis
Fourier restriction theory
Created
2026-09-24
Updated
2026-09-24
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Kakeya inequalities
bound overlaps of long thin tubes with controlled directions.
Table of contents
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
R
1/2
×
R
1/2
×
R
tubes in
R
3
,
∏
j
=
1
3
(
∑
T
∈
T
j
χ
T
)
1/3
3/2
≲
ϵ
R
1
+
ϵ
∏
j
=
1
3
∣
T
j
∣
1/3
.
(1)
Ancestors
(6)
Fourier restriction theory
Fourier analysis
Analysis
Area of mathematics
Mathematics
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