activity
20002025
most citedA Gradient Flow for Worldsheet Nonlinear Sigma Models

99 citations · 687 across the 54 of their papers we have counts for

collaborators

56 papers

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-qc2024★ 7 cited

Past instability of FLRW solutions of the Einstein-Euler-scalar field equations for linear equations of state with

Florian Beyer, Elliot Marshall, Todd A. Oliynyk

Using numerical methods, we examine, under a Gowdy symmetry assumption, the dynamics of nonlinearly perturbed FLRW fluid solutions of the Einstein-Euler-scalar field equations in t…

math.AP2024

Future stability of perfect fluids with extreme tilt and linear equation of state for the Einstein-Euler system with positive cosmological constant: The range

Grigorios Fournodavlos, Elliot Marshall, Todd A. Oliynyk

We study the future stability of cosmological fluids, in spacetimes with an accelerated expansion, which exhibit extreme tilt behavior, ie. their fluid velocity becoming asymptotic…

gr-qc2023

On the fractional density gradient blow-up conjecture of Rendall

Todd A. Oliynyk

On exponentially expanding Friedmann-Lemaître-Robertson-Walker (FLRW) spacetimes, there is a distinguished family of spatially homogeneous and isotropic solutions to the relativist…

gr-qc2023★ 5 cited

Past stability of FLRW solutions to the Einstein-Euler-scalar field equations and their big bang singularites

Florian Beyer, Todd A. Oliynyk

We establish, in spacetime dimensions , the nonlinear stability in the contracting direction of Friedmann-Lemaître-Robertson-Walker (FLRW) solutions to the Einstein-Euler-…

gr-qc2023★ 10 cited

Future instability of FLRW fluid solutions for linear equations of state with

Florian Beyer, Elliot Marshall, Todd A. Oliynyk

Using numerical methods, we examine the dynamics of nonlinear perturbations in the expanding time direction, under a Gowdy symmetry assumption, of FLRW fluid solutions to the Einst…