Abstract
We consider Einstein-like gravitational equations with Λ term proportional to the trace of the energy tensor. The possibility of Lagrangian formulation is shortly discussed. The theory is consistent with the present-day observations, both at the local and cosmological level. Horizon-free cosmological solutions are found and discussed. The initial condition S(0) = 0 (where S(t) is the expansion factor and t the cosmic time) requires hyperbolic space.
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Massa, C. Einstein-Like Equations with Coupled-to-Matter Λ Term. Astrophysics and Space Science 271, 83–89 (2000). https://doi.org/10.1023/A:1002420604107
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DOI: https://doi.org/10.1023/A:1002420604107