Seminars

Estimaciones del Volúmen del Glaciar Tyndall usando satélites de radar

Event Date: Nov 19, 2018 in Ciclo de Seminarios quincenales de la Alianza Copernicus-Chile, Seminars

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Well-posedness and long time behavior for the Schrödinger-Korteweg-de Vries interactions on the half-Line

Event Date: Nov 19, 2018 in CAPDE, Seminars

Abstract:   In this talk we discuss about the initial-boundary value problem for the Schrödinger-Korteweg-de Vries system on the left and right half-line for a wide class of initial-boundary data, including the energy regularity H1(R±) × H1(R±) for initial data. Assuming homogeneous boundary conditions it is shown for positive coupling interactions that local solutions can be extended globally in time for initial data in the energy space; furthermore, for negative coupling interactions it was proved, for a certain class of regular initial data, the following result: if the respective...

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Resonances in deformed tubes: twisting and bending & Gross-Pitaevskii equation and integrable systems

Event Date: Nov 12, 2018 in CAPDE, Seminars

16:00 hrs.   Expositor Pablo Miranda, (USach) Título Resonances in deformed tubes: twisting and bending Abstract: In this talk we will consider  an infinite straight tube and  we will deform it  by a periodic twisting and a local bending. On the deformed tube we will define the Laplacian and will study the existence of scattering resonances created by the deformations. We will show the existence of exactly one resonance or one eigenvalue near the bottom of the essential spectrum, depending on the strength of the twisting and the bending. We will also obtain the asymptotic behavior of the...

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An approach to optimality in convex optimization via some new Moreau- Rockafellar type formulas for the subdifferential of the supremum function.

Event Date: Nov 07, 2018 in Optimization and Equilibrium, Seminars

Abstract: We present different characterizations of the subdifferential of the supremum function of finitely and infinitely indexed families of convex functions under weak continuity assumptions. The resulting formulas are given in terms of the exact subdifferential of the data functions at the reference point, and not at nearby points. Based on these characterizations we give new Fritz-John and KKT-type optimality conditions for semi-infinite convex optimization, dropping out the typical continuity/closedness assumptions which are usual in the literature. The presentation is a selection of...

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Confort y la calidad climática en el Espacio Público. Estudio de caso: ciudad de Chillán, Chile

Event Date: Nov 05, 2018 in Ciclo de Seminarios quincenales de la Alianza Copernicus-Chile, Seminars

Seminarios de la Alianza Copernicus-Chile Titulo                 Confort y la calidad climática en el Espacio Público. Estudio de caso: ciudad de Chillán, Chile Expositor    Pamela Smith U. de Chile Sala:  Sala Multimedia, Centro de Modelamiento Matemático, Beauchef 851, Edificio Norte, Piso 6. Fecha:  Lunes 05 de Noviembre de 2018 Hora:  16:00 horas   Participación en Linea:  http://vcespresso.redclara.net/@352109705c115cdd511fb968f9f4ff86# Use Explorer, Firefox o Safari, debe tener instalado Flash Player...

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Exponentes de Lyapunov y rigidez para difeomorfismos hiperbólicos y parcialmente hiperbólicos

Event Date: Oct 22, 2018 in Dynamical Systems, Seminars

ABSTRACT Voy a presentar unos resultados de rigidez en termino de exponentes de Lyapunov para difeomorfismos hiperbólicos y parcialmente hiperbólicos. Si un difeomorfismo hiperbólico (o parcialmente hiperbólico) es cerca a un automorfismo lineal (o un skew product sobre un automorfismo lineal), preserva el volumen, y tiene los mismos exponentes de Lyapunov (estables e inestable), entonces es suavemente conjugado al automorfismo lineal (o a un skew product sobre el automorfismo lineal). En el caso de difeomorfismos hiperbólicos el resultado puede ser visto como un análogo a la conjetura de...

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