Seminario IPCT

The Fractional Anisotropic Calderón Problem

Event Date: Sep 29, 2025 in Seminario IPCT, Seminars

RESUMEN:  We will discuss some recent progress on the anisotropic Calderón problem for the fractional Laplacian.

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Inverse scattering for asymptotically hyperbolic manifolds.

Event Date: Aug 14, 2025 in Seminario IPCT, Seminars

RESUMEN: On compact Riemannian manifolds with boundary, the (anisotropic) Calderón’s problem asks to what extent the  Dirichlet-to-Neumann map associated with the Laplace—Beltrami equation determines the metric (up to a natural obstruction). In this talk, I will discuss a similar problem, known as inverse scattering for asymptotically hyperbolic manifolds (i.e., manifolds  that, outside a compact region, behave like the hyperbolic space): fixed an “energy level”, and  given the analog of the  Neumann data for solutions to certain 0-elliptic PDE depending on the fixed energy...

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Fully Stochastic Reconstruction for Inverse Radiative Transport.

Event Date: Nov 30, 1999 in Seminario IPCT, Seminars

RESUMEN: The Radiative Transport Equation (RTE) arises in applications in tomography based on photon propagation. Whereas it has a direct solution for non-scattering media it is complicated to solve for cases involving significant scattering. In these cases, Monte Carlo (MC) methods are a widely applicable and accurate class of modelling techniques that converge to the deterministic solution in the limit of an infinite number simulated photons. Classical methods for solving the inverse problem that involve a non-linear optimisation approach can be combined with advances in stochastic...

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Un problema inverso de interfaz y su aplicación para el modelamiento de sismos de subducción.

Event Date: Jul 03, 2025 in Seminario IPCT, Seminars

RESUMEN: La costa del Pacífico es una zona con alta actividad sísmica. En los últimos 100 años, Chile ha sufrido 7 terremotos de magnitud 8.0 o superior, causando graves daños a diversas edificaciones, cambiando la geografía local y causando la muerte de miles de personas. De todos ellos, los más destructivos han sido sismos de subducción (Valdivia 1960, Constitución 2010). Un sismo de subducción puede ser modelado como la interacción de dos cuerpos donde uno se desliza con respecto al otro sobre una superficie, o bien, a partir de un único dominio dividido en dos subdominios con una...

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The inverse elasticity problem, its extension to porous media and applications in biomedicine.

Event Date: May 09, 2025 in Seminario IPCT, Seminars

RESUMEN: The inverse elasticity problem can be simply stated as: given a deformed configuration and the forces that act on it, find an initial stress-free configuration such that when the given forces are applied to it, one recovers the given deformed configuration. Surprisingly, this problem can be framed as a (direct) elasticity one, whose mathematical properties are inherited from the original direct problem if the underlying material is sufficiently regular. In this seminar, I will review this problem and its main mathematical properties. After this brief introduction, I will show some...

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Estabilidad Lipschitz en un problema inverso para un operador parabólico semi-discreto.

Event Date: Apr 10, 2025 in Seminario IPCT, Seminars

RESUMEN: En esta presentación, se abordará un problema inverso para una ecuación parabólica semi- discreta, donde el objetivo es identificar el término en el lado derecho de la ecuación (la fuente) a partir de mediciones de la solución en un tiempo intermedio y dentro de un subdominio espacial. A partir de este resultado, se puede establecer una estimación de estabilidad para la función potencial cuando esta depende únicamente del espacio. Se presentará una nueva estimación de Carleman en el contexto semi-discreto, cuya dependencia del parámetro está determinada por el tamaño de la malla....

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