OP-01031 Partially resolved Four-term progressions in Fourier-uniform sets CO · arithmetic progressions · counting lemmas · Fourier uniformity · higher-order Fourier analysis
OP-01134 Solution claimed Sharpness of the Cohn–Elkies bound for circle packings MG · circle packing · Fourier analysis · linear programming bounds · sphere packing
OP-01138 Needs verification Two spaces of quadratically structured functions on an abelian group CO · convolution algebras · higher-order Fourier analysis · uniformly almost periodic functions