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The Rayleigh-B\'enard system with stress-free boundary conditions is shown to have a global attractor in each affine space where velocity has fixed spatial average. The physical problem is shown to be equivalent to one with periodic…

Analysis of PDEs · Mathematics 2020-04-21 Yu Cao , Michael S. Jolly , Edriss S. Titi , Jared P. Whitehead

In this article we develop some new existence results for the Einstein constraint equations using the Lichnerowicz-York conformal rescaling method. The mean extrinsic curvature is taken to be an arbitrary smooth function without…

General Relativity and Quantum Cosmology · Physics 2010-01-13 M. Holst , G. Nagy , G. Tsogtgerel

We prove in this note that local geometric uniqueness holds true without loss of regularity for Einstein equations coupled with a large class of matter models. We thus extend the Planchon-Rodnianski uniqueness theorem for vacuum spacetimes.…

Mathematical Physics · Physics 2011-09-06 David Parlongue

We make use of the metric version of the conformal Einstein field equations to construct anti-de Sitter-like spacetimes by means of a suitably posed initial-boundary value problem. The evolution system associated to this initial-boundary…

General Relativity and Quantum Cosmology · Physics 2018-12-19 Diego A. Carranza , Juan A. Valiente Kroon

We characterize the well-posedness of a class of infinite-dimensional port-Hamiltonian systems with boundary control and observation. This class includes in particular the Euler-Bernoulli beam equations and more generally 1D linear…

Analysis of PDEs · Mathematics 2025-07-11 Bouchra Elghazi , Birgit Jacob , Hans Zwart

This article solves the initial boundary value problem for the vacuum Einstein equations with a negative cosmological constant in dimension 4, giving rise to asymptotically Anti-de Sitter spaces. We introduce a new family of geometric…

General Relativity and Quantum Cosmology · Physics 2025-07-29 Ludovic Souêtre

In this paper, we prove the global existence of solutions to the relativistic Vlasov-Poisson system for general initial data in convex bounded domains of two space dimensions, assuming the specular reflection boundary conditions for the…

Analysis of PDEs · Mathematics 2025-11-11 Yanmin Mu , Dehua Wang

Bondi-like (single-null) characteristic formulations of general relativity are used for numerical work in both asymptotically flat and anti-de Sitter spacetimes. Well-posedness of the resulting systems of partial differential equations,…

General Relativity and Quantum Cosmology · Physics 2020-10-09 Thanasis Giannakopoulos , David Hilditch , Miguel Zilhao

We study the well-posedness of the compressible boundary layer equations with data being analytic in the tangential variable of the boundary. The compressible boundary layer equations, a nonlinear coupled system of degenerate parabolic…

Analysis of PDEs · Mathematics 2025-07-25 Ya-Guang Wang , Yi-Lei Zhao

This paper is concerned with existence, uniqueness and stability of the solution for the 3D Prandtl equation in a polynomial weighted Sobolev space. The main novelty of this paper is to directly prove the long time well-posedness to 3D…

Analysis of PDEs · Mathematics 2025-08-26 Yuming Qin , Junchen Liu

We prove the existence and local uniqueness of asymptotically flat, static vacuum metrics with arbitrarily prescribed Bartnik boundary data that are close to the induced boundary data on any star-shaped hypersurface or a general family of…

Differential Geometry · Mathematics 2022-03-03 Zhongshan An , Lan-Hsuan Huang

We propose a boundary term to the Einstein-Gauss-Bonnet action for gravity, which is constructed as the dimensional continuation of the Chern-Weil theorem, and such that the extremization of the full action yields the equations of motion…

General Relativity and Quantum Cosmology · Physics 2018-05-16 Nathalie Deruelle , Nelson Merino , Rodrigo Olea

We study the boundary rigidity problem with partial data consisting of determining locally the Riemannian metric of a Riemannian manifold with boundary from the distance function measured at pairs of points near a fixed point on the…

Differential Geometry · Mathematics 2015-10-09 Plamen Stefanov , Gunther Uhlmann , Andras Vasy

Considering a generalization of the Gibbons-Hawking-York covariant boundary action that depends on both the extrinsic and the intrinsic geometry of the boundary, we derive boundary conditions for the cosmological background and tensor…

General Relativity and Quantum Cosmology · Physics 2023-05-26 David Brizuela , Marco de Cesare

We consider a hybrid bimetric model where, in addition to the ordinary metric tensor that determines geometry, an informational metric is introduced to describe the reference frame of an observer. We note that the local information metric…

General Relativity and Quantum Cosmology · Physics 2023-09-22 Merab Gogberashvili

In this article we initiate a systematic study of the well-posedness theory of the Einstein constraint equations on compact manifolds with boundary. This is an important problem in general relativity, and it is particularly important in…

General Relativity and Quantum Cosmology · Physics 2015-06-16 Michael Holst , Gantumur Tsogtgerel

In this paper, we prove a localised version of the bounded $L^2$-curvature theorem of Klainerman-Rodnianski-Szeftel. More precisely, we consider initial data for the Einstein vacuum equations posed on a compact spacelike hypersurface…

Analysis of PDEs · Mathematics 2019-05-22 Stefan Czimek

We study stationary hollow vortices with surface tension in two dimensions. Such objects solve an overdetermined elliptic free boundary problem in an exterior domain, with an additional boundary condition involving mean curvature and the…

Analysis of PDEs · Mathematics 2026-05-14 Lukas Niebel

The Weiss variation of the Einstein-Hilbert action with an appropriate boundary term has been studied for general boundary surfaces; the boundary surfaces can be spacelike, timelike, or null. To achieve this we introduce an auxiliary…

General Relativity and Quantum Cosmology · Physics 2022-07-20 Justin C. Feng , Sumanta Chakraborty

We prove a Donsker and a Glivenko--Cantelli theorem for sequences of random discrete measures generalizing empirical measures. Those two results hold under standard conditions upon bracketing numbers of the indexing class of functions. As a…

Statistics Theory · Mathematics 2016-09-27 Davit Varron