A precise symbolic emulator of the linear matter power spectrum

Open Access

Fig. 1.

Pareto front of solutions obtained using OPERON when fitting $σ_{8} / \sqrt{10^{9} A_{s}}$ $\sigma_8 / \sqrt{10^9 A_{\mathrm{s}}}$ as a function of Ω_b, Ω_m, h and n_s. We plot the root mean squared error as a function of model length from the training and validation sets separately. The model in Eq. (4) has a model length of 27.

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