The nonlinear stability of -dimensional FLRW spacetimes

P Mondal - Journal of Hyperbolic Differential Equations, 2024 - World Scientific
We prove nonlinear Lyapunov stability of a family of “(n+ 1)”-dimensional cosmological
models of general relativity locally isometric to the Friedman–Lemaître–Robertson–Walker …

On the global well-posedness of the Einstein–Yang–Mills system

P Griggs, P Mondal - Journal of Mathematical Physics, 2023 - pubs.aip.org
In this paper, we present a partial result on the global well-posedness of the Cauchy
problem for the Einstein–Yang–Mills system in constant mean extrinsic curvature spatial …

Examples of cosmological spacetimes without CMC Cauchy surfaces

E Ling, A Ohanyan - Letters in Mathematical Physics, 2024 - Springer
CMC (constant mean curvature) Cauchy surfaces play an important role in mathematical
relativity as finding solutions to the vacuum Einstein constraint equations is made much …

The linear stability of the n+ 1 dimensional FLRW spacetimes

P Mondal - Classical and Quantum Gravity, 2021 - iopscience.iop.org
Here we prove the linear stability of a family of'n+ 1'-dimensional cosmological models of
general relativity locally isometric to the Friedmann Lemaître Robertson Walker (FLRW) …

Causal geodesic incompleteness of spacetimes arising from IMP gluing

M Burkhart, D Pollack - General Relativity and Gravitation, 2019 - Springer
Abstract In 2002, Isenberg–Mazzeo–Pollack (IMP) constructed a family of vacuum initial data
sets via a gluing construction. In this paper, we investigate some local geometry of these …

Spacelike hypersurfaces in twisted product spacetimes with complete fiber and Calabi–Bernstein-type problems

A Soria - Journal of Geometry, 2023 - Springer
In this article spacelike hypersurfaces immersed in twisted product spacetimes I× f F with
complete fiber are studied. Several conditions ensuring global hyperbolicity are presented …

Local well-posedness of the Einstein-Yang-Mills system in constant mean extrinsic curvature spatial harmonic generalized Coulomb gauge

P Mondal - Journal of Mathematical Physics, 2023 - pubs.aip.org
We study the local well-posedness of the Einstein-Yang-Mills equations in constant mean
extrinsic curvature spatial harmonic generalized Coulomb gauge. In this choice of gauge …

The equivalence of smooth and synthetic notions of timelike sectional curvature bounds

T Beran, M Kunzinger, A Ohanyan, F Rott - arXiv preprint arXiv …, 2024 - arxiv.org
Timelike sectional curvature bounds play an important role in spacetime geometry, both for
the understanding of classical smooth spacetimes and for the study of Lorentzian (pre-) …

Remarks on the existence of CMC Cauchy surfaces

GJ Galloway, E Ling - International Meeting on Lorentzian Geometry, 2021 - Springer
As is well known, constant mean curvature (CMC) spacelike hypersurfaces play an
important role in solving the Einstein equations, both in solving the contraints and the …

Vacuum cosmological spacetimes without CMC Cauchy surfaces

E Ling, A Ohanyan - arXiv preprint arXiv:2407.21524, 2024 - arxiv.org
In this article, we extend a construction of [6] to obtain a large class of vacuum cosmological
spacetimes that do not contain any CMC Cauchy surfaces. The allowed spatial topologies …