The radiation instability in modified gravity
arXiv:2012.05850 · doi:10.1142/S0217751X21500603
Abstract
We study the problem of the instability of inhomogeneous radiation universes in quadratic lagrangian theories of gravity written as a system of evolution equations with constraints. We construct formal series expansions and show that the resulting solutions have a smaller number of arbitrary functions than that required in a general solution. These results continue to hold for more general polynomial extensions of general relativity.
v2: 34 pages, references added, version to match the published one
References in corpus (5)
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