Planck 2018 results
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Fig. 6.


Base-ΛCDM 68% and 95% marginalized constraint contours for the matter density and , a fluctuation amplitude parameter that is well constrained by the CMB-lensing likelihood. The Planck TE, TT, and lensing likelihoods all overlap in a consistent region of parameter space, with the combined likelihood substantially reducing the allowed parameter space.

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