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Testing Schouten--Codazzi Gravity: Cosmological Constraints and Deviations from $Λ$CDM
Schouten--Codazzi gravity (SCG) admits a cosmological background that extends flat $Λ$CDM by one integration constant, $γ_0$. Its contribution to the Friedmann equation scales as $(1+z)$ and corresponds to an effective component with equation of state $w_{γ_0}=-2/3$. We constrain this extension usin
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