On the (Fourier analytic) Sidon constant of {0,1,2,3}

Stefan Neuwirth

This constant is the maximum of the sum $|c_0|+|c_1|+|c_2|+|c_3|$ of the moduli of the coefficients of a trigonometric polynomial $c_0+c_1{e}^{it}+c_2{e}^{2it}+c_3{e}^{3it}$ bounded by 1…