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The Kuramoto–Daido models h(φ − ψ) constructed for ε = 0.5 and ν = 0.7 (a) and h(φ − 3ψ) for ε = 0.5, ν = 0.3 (b). Blue points show the exact values of the phase derivative. Solid and dashed curves are the results of two ways of averaging: the first one is obtained by taking the corresponding diagonal Fourier modes of the reconstructed full coupling function Q(φ, ψ), while the second one is obtained via a direct Fourier fit of blue dots. (Online version in colour.)
