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SINGinGR

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Singularities in General Relativity

One of the outstanding open mathematical problems in General Relativity is to understand how singularities form in solutions to the Einstein equations. Singularities are typically found in the interior of black holes or at the Big... ver más

31/03/2028

FOUNDATION FOR RES...

1M€

Presupuesto del proyecto: 1M€

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IDRYMA TECHNOLOGIAS KAI EREVNAS No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

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Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-04-01

ERC-2022-STG: ERC STARTING GRANTS Scope:Objectives

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Duración del proyecto: 59 meses Fecha Inicio: 2023-04-01
Fecha Fin: 2028-03-31

Líder del proyecto

IDRYMA TECHNOLOGIAS KAI EREVNAS No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 1M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto One of the outstanding open mathematical problems in General Relativity is to understand how singularities form in solutions to the Einstein equations. Singularities are typically found in the interior of black holes or at the Big Bang. The main objective of this proposal is to start a research group at the University of Crete that will develop novel mathematical techniques, combining ingredients from analysis, partial differential equations, and differential geometry, which will enable us to prove the formation of singularities in various new settings and test long-standing conjectures in the field.Dynamics of Big Bang singularities. In vacuum, the generic cosmological singularity is conjecturally spacelike, local, and oscillatory. The only rigorous evidence in favor of the latter scenario is restricted to homogeneous solutions. We intend to construct Big Bang singularities containing spikes or oscillations, without symmetries and analyticity, that test the conjectural picture. Here, previous work of the PI with J. Luk constructing Kasner-like singularities will be useful, since they are the building blocks of more complicated scenarios. We also intend to dynamically study the submanifold of Big Bang singularities having no oscillations, by advancing techniques recently developed in work of the PI and collaborators to prove stable Big Bang formation in the sub-critical regime.The black hole interior problem. The stable phenomenon that has been observed so far in black hole regions is Cauchy horizon formation. Our goal is to show that in certain regimes, a similar situation to that of Big Bangs occurs, where part of the inner black hole boundary is spacelike and singular. We consider the Einstein-massless-scalar field system, as well as the classical Oppenheimer-Snyder dust model of gravitational collapse, for a class of initial data outside of spherical symmetry, where singularity formation has not yet been understood.

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