2024/06/17 by Benoist, Yves
#FOS: Mathematics #Number Theory (math.NT)
paper · doi:10.48550/arxiv.2406.11529
On a cyclic group of prime order, the non-trivial Dirichlet characters together with their Fourier transforms have constant modulus outside 0 and vanish at 0. Answering a question of H. Cohn, we construct new functions with these properties. The proof relies on Floer homology. We also apply this method to the biunimodular functions problem.