RIE stabilizes best-fit cosmological parameters better than sample covariance or NERCOME for galaxy power spectra when the number of mocks is close to the data-vector dimension.
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Denoising clustering covariance matrices with Rotational Invariant Estimators
RIE stabilizes best-fit cosmological parameters better than sample covariance or NERCOME for galaxy power spectra when the number of mocks is close to the data-vector dimension.