Four new exact Bianchi I solutions in a non-variational scalar field model produce Big Bang, Big Crunch, Big Rip, and cyclic behaviors, with stability to inhomogeneous perturbations depending on singularity type.
Geometrical Theorems on Einstein’s Cosmological Equations.American Journal of Mathematics, 43(4):217–221
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Kasner spacetime is singularity-free in conformal gravity because its curvature invariants are regular and geodesics for massive, massless, and conformally coupled particles are complete.
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Non-variational scalar field cosmology: Exact Bianchi I solutions for near-minimal scalar fields
Four new exact Bianchi I solutions in a non-variational scalar field model produce Big Bang, Big Crunch, Big Rip, and cyclic behaviors, with stability to inhomogeneous perturbations depending on singularity type.
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Approaching a spacetime singularity in conformal gravity
Kasner spacetime is singularity-free in conformal gravity because its curvature invariants are regular and geodesics for massive, massless, and conformally coupled particles are complete.