Reconstructions of w(z) and H₀(z) based on simulated injection. The gray lines denote the injected models. For w(z), the dashed gray line represents the CPL parameterization with w(z) = − 0.5 − 2(1 − 1/(1 + z)) and the dash-dotted gray line shows the oscillation model with w(z) = 0.8 sin[20(1 − 1/(1 + z))]−1. For simplicity, the other injected parameters are fixed with Ω_m = 0.3, ω_bh² = 0.02196, and M_b = −19.5. For H₀(z), the dashed gray line corresponds to H₀(z) = 73 − 9.8(1 − 1/(1 + z)). The shaded regions indicate the corresponding 90% credible intervals. The prior of H₀(z) uses the Gaussian kernel with l = 2.0, and the prior of w(z) was generated from the Matérn-3/2 kernel (l = 2.5).