At Hanging Rock, Victoria
In 2026, I will be starting a postdoc at FORTH in Crete, Greece working with Grigorios Fournodavlos.
I completed my PhD at Monash University in 2025 under the supervision of Todd Oliynyk. A copy of my CV can be found here.
E-mail: elliot.marshall[at]monash.edu
General Relativity, Numerical Methods, Partial Differential Equations, Analysis. I am interested in using both numerical methods and analysis to investigate problems in mathematical relativity, such as non-linear stability and shock formation, with a particular focus on cosmology.
(with Grigorios Fournodavlos and Todd Oliynyk) Future Stability of Tilted Two-Fluid Bianchi I Spacetimes, arXiv:2508.15155
Instability of Slowly Expanding FLRW Spacetimes, Class. Quantum Grav. 42, (2025), 105005, pdf
(with Florian Beyer and Todd Oliynyk) Past instability of FLRW solutions of the Einstein-Euler-scalar field equations for linear equations of state p=Kρ with 0 ≤ K < 1/3, Phys. Rev. D 110, (2024), 044060, pdf
(with Grigorios Fournodavlos and Todd Oliynyk) Future stability of perfect fluids with extreme tilt and linear equation of state p=c_{s}^{2}ρ for the Einstein-Euler system with positive cosmological constant: The range 1/3 < c_{s}^{2} < 3/7, arXiv:2404.06789
(with Florian Beyer and Todd Oliynyk) Future instability of FLRW fluid solutions for linear equations of state p=Kρ with 1/3 < K < 1, Phys. Rev. D 107, (2023), 104030, pdf
(with Todd Oliynyk) On the stability of relativistic perfect fluids with linear equations of state p=Kρ where 1/3 < K < 1, Lett. Math. Phys. 113 (2023), 102, pdf
PhD in Mathematics (2022 - 2025), Monash University, Main Supervisor: Todd Oliynyk, External Co-Supervisor: Florian Beyer
BSc (Hons), 1st Class in Mathematics (2021), University of Otago, Supervisor: Jörg Frauendiener
BSc in Mathematics (2020), University of Otago.
General Relativity Seminar, University of Cambridge, 20 February 2026
Gravity Seminar, University of Southampton, 19 February 2026
London PDE Seminar, Imperial College, 18 February 2026
Cretan Stars Workshop, Anogia, Crete, 1-3 November 2025
Harvard CMSA General Relativity Seminar, 25 March 2025.
Joint Meeting of the NZMS, AustMS, and AMS, University of Auckland, 9-13 December, 2024.
Problems and Progress in Dispersive PDE, University of Otago, 5-6 December, 2024.
12th Australasian Conference on General Relativity and Gravitation (ACGRG), Hobart, Tasmania, November 27 - December 1, 2023.
MATRIX conference on Hyperbolic PDEs and Non-Linear Evolution Problems, Creswick, Australia, September 18-29, 2023.
Interdisciplinary Junior Scientist Workshop: Mathematical General Relativity, Wildberg, Germany, February 26 - March 10, 2023.
I was the main organiser of the first Australia-New Zealand Student Conference on Relativity, Cosmology, and Astrophysics, May 8-10, 2023.