Abstract
Let Ë be a small subset of a finite abelian group, and let R be the set of points at which its Fourier transform is large. A result of Chang states that R has a great deal of additive structure. We give a statement and a proof of this result and discuss some applications of it. Finally, we discuss some related open questions.
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Green, B. (2004). Spectral Structure of Sets of Integers. In: Brandolini, L., Colzani, L., Travaglini, G., Iosevich, A. (eds) Fourier Analysis and Convexity. Applied and Numerical Harmonic Analysis. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-0-8176-8172-2_4
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DOI: https://doi.org/10.1007/978-0-8176-8172-2_4
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