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gr-qc2025
Mixmaster Fluids Near the Big Bang
Elliot Marshall
We numerically study the approach to the singularity in -symmetric cosmological spacetimes containing a non-stiff perfect fluid satisfying a linear equation of stat…
gr-qc2025
Future Stability of Tilted Two-Fluid Bianchi I Spacetimes
Grigorios Fournodavlos, Elliot Marshall, Todd A. Oliynyk
We establish the nonlinear stability to the future of tilted two-fluid Bianchi I solutions to the Einstein-Euler equations with positive cosmological constant and linear equations…
gr-qc2025
Instability of Slowly Expanding FLRW Spacetimes
Elliot Marshall
We numerically study, under a Gowdy symmetry assumption, nonlinear perturbations of the decelerated FLRW fluid solutions to the Einstein-Euler system toward the future for linear e…