N-point functions of locally non-Gaussian fields can be expanded in powers of the Gaussian correlation function using the Kibble-Slepian decomposition, with coefficients from one-point integrals; for an exponential-tail model the strong-non-Gaussian two-point function is exactly (ξ0/8β²)arcsin²(ξ_G/
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A non-perturbative framework for N-point functions of locally non-Gaussian fields
N-point functions of locally non-Gaussian fields can be expanded in powers of the Gaussian correlation function using the Kibble-Slepian decomposition, with coefficients from one-point integrals; for an exponential-tail model the strong-non-Gaussian two-point function is exactly (ξ0/8β²)arcsin²(ξ_G/