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Lorentzian Calderon problem: visibility and invisibility

This project addresses questions in the mathematical theory of inverse problems, a research field at the interface between pure and applied mathematics. The techniques that will be developed lie at the intersection of partial diff... ver más

31/07/2028

HELSINGIN YLIOPIST...

1M€

Presupuesto del proyecto: 1M€

Líder del proyecto

HELSINGIN YLIOPISTO No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-02-19

ERC-2022-COG: ERC CONSOLIDATOR GRANTS Scope:Objectives

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1 Participantes

HELSINGIN YLIOPISTO

1.37M€ | Lider

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Duración del proyecto: 65 meses Fecha Inicio: 2023-02-19
Fecha Fin: 2028-07-31

Líder del proyecto

HELSINGIN YLIOPISTO No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 1M€

Descripción del proyecto This project addresses questions in the mathematical theory of inverse problems, a research field at the interface between pure and applied mathematics. The techniques that will be developed lie at the intersection of partial differential equations and geometry, with affinity to control theory and general relativity. The Lorentzian Calderon problem is central to the proposal. A physical interpretation of the problem asks us to recover a moving medium given data generated by acoustic waves probing the medium, and seen from the mathematical point of view, it is the simplest formulation of an inverse boundary value problem for a linear wave equation that is expressed in a generally covariant fashion. The project explores the geometric conditions under which the problem can be solved, that is, media that are visible to probing waves, as well as counterexamples violating such conditions, leading to invisibility. The Lorentzian Calderon problem is poorly understood in comparison to similar inverse problems for nonlinear wave equations. One of the guiding ideas in the project is to adapt techniques from the theory of these problems, developed recently by PI and others, to the Lorentzian Calderon problem. Another source of inspiration is the recent solution of the Lorentzian Calderon problem under curvature bounds by PI and his coauthors. The project develops a new approach to solve the Lorentzian Calderon problem, and this may also lead to a breakthrough in the resolution of the Riemannian version of the problem, often called the anisotropic Calderon problem. The latter problem has remained open for more than 30 years. In addition to being the hyperbolic analogue of this well-known problem, the Lorentzian Calderon problem can be viewed as a generalization of the even more classical inverse problem studied by Gelfand and Levitan in the 1950s.

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