“…We list large-scale cosmological simulation projects for emulators that interpolate summary statistics measured from simulations over the cosmological parameter space in Table 1. We note also that there are many other attempts to utilize emulators for different purposes, such as developing fast Boltzmann equation solvers or performing low-order perturbative calculations [323][324][325][326][327][328][329][330][331][332][333][334][335][336], to explore the galaxy-halo connection for fixed cosmology [337], to translate less costly, low-resolution simulations to mimic more expensive simulations. More specifically, the applications include incorporating baryonic effects to the dark-matter only simulations [338], predicting Lyman-α forest [339,340] or 21-cm power spectra [341,342], extrapolating the predictions in Λ-Cold Dark Matter ¶ Here, convergence means the change in the observed size of an object caused by gravitational lensing effect.…”