Boolean functions with small spectral norm

被引:18
|
作者
Green, Ben [1 ]
Sanders, Tom [1 ]
机构
[1] Univ Cambridge, Dept Pure Math & Math Stat, Cambridge CB3 0WA, England
关键词
Fourier transform; spectral norm; L-1-norm; boolean functions; structure theorem;
D O I
10.1007/s00039-008-0654-y
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Let f : F-2(n) ->{0, 1} be a boolean function, and suppose that the spectral norm parallel to f parallel to(A) := Sigma(r) vertical bar(f) over cap (r)vertical bar of f is at most M. Then [GRAPHICS] where L <= 2(2CM4) and each H-j is a subgroup of F-2(n). This result may be regarded as a quantitative analogue of the Cohen Helson - Rudin structure theorem for idempotent measures in locally compact abelian groups.
引用
收藏
页码:144 / 162
页数:19
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