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A geometric model I've been studying derives cosmological parameters from the postulate that the Schwarzschild radius equals twice the cosmic radius at all scales ($r_s = 2R$). It claims to resolve the Hubble tension via a time dilation factor γ(z) = √(2z+1), fit rotation curves without dark matter, and interpret the CMB as boundary radiation.

The preprint is at https://doi.org/10.5281/zenodo.19296662.

What are the strongest existing observational constraints that would test or falsify this class of model?

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  • $\begingroup$ Related. $\endgroup$ Commented 2 days ago
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    $\begingroup$ The Schwarzschild radius of what? It's not a global parameter, it is a property of certain objects. $\endgroup$ Commented 2 days ago
  • $\begingroup$ The Schwarzchild radius of the entire cosmos (S3-B4 manifold). The boundary condition is modeled from a 4D white hole, which currently does not have defined physics. It's simply an hypothesis. $\endgroup$ Commented 2 days ago

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