Seminars

Seminars appear in decreasing order in relation to date. To find an activity of your interest just go down on the list. Normally seminars are given in english. If not, they will be marked as Spanish Only.

 

Estimación de variación total y volatilidad en modelos unificados de GARCH-Ito con saltos.

Event Date: Jan 16, 2019 in Seminars, Stochastic Modeling

Estimación de variación total y volatilidad en modelos unificados de GARCH-Ito con saltos. Resumen:   Los modelos discretos de GARCH y continuos de Drift-Difusión son ampliamente utilizados en campos como finanzas y neurociencia. El modelo GARCH-Ito, introducido recientemente por Wang y Kim, superpone un modelo GARCH en tiempos discretos en el modelo de Ito para la volatilidad instantánea. En este trabajo, se propone una metodología conjunta para la estimación de la variación cuadratica para trayectorias con discontinuidades, utilizando...

Minicuro: Sarnak Conjecture: a link between ergodic theory and number theory

Event Date: Jan 14, 2019 in CMM Modeling, Seminars

Abstract:   In these series of talks we will look how several conjecture in number theory have a translation in ergodic theory and how applications go from one theory to the other. We focus mostly in the mechanisms allowing to pass from one theory to the other. No pre-requisists in number theory are needed.   Date: 10:30 AM, Monday 14, Wednesday 16, Thursday 17, January 2019.

Applications of noisy quantum devices

Event Date: Jan 11, 2019 in CMM Modeling, Seminars

Abstract: Near-term applications of early quantum devices rely on accurate estimates of expectation values to become relevant. Decoherence and gate errors lead to wrong estimates. This problem was, at least in theory, remedied with the advent of quantum error correction. However, the overhead that is needed to implement a fully fault-tolerant gate set with current codes and current devices seems prohibitively large. In turn, steady progress is made in improving the quality of the quantum hardware and we believe that we can build machines in...

Functional inequalities, flows, symmetry and spectral estimates

Event Date: Dec 07, 2018 in CMM Modeling, Seminars

ABSTRACT:   In this talk I will review recent result about how the use of linear and nonlinear flows has been key to prove functional inequalities and qualitative properties for their extremal functions. I will also explain how from these inequalities and their best constants, optimal spectral estimates can be obtained for Schrödinger operators. This is a topic which is at the crossroads of nonlinear analysis and probability, with implications in differential geometry and potential applications in modelling in physics and...

New algorithmic ideas for the “de novo” assembly of human populations

Event Date: Dec 05, 2018 in CMM-Bio, Seminars

Abstract: Decoding the genome of the entire human population is currently regarded as a feasible task due to the accelerated development of sequencing technologies. Two major approaches have been proposed to decode the genomic sequence of human individuals namely resequencing and de novo assembly. Currently, resequencing is the dominant approach and consists in sequencing genomic fragments (reads) and compares them to the human reference sequence. Contrary to the resequencing idea, the de novo assembly approach compute overlaps among the...

15 años de observación satelital sobre el océano del Sur de Chile. Aplicaciones en el rango óptico y de radar

Event Date: Dec 04, 2018 in Ciclo de Seminarios quincenales de la Alianza Copernicus-Chile, Seminars

Seminarios de la Alianza Copernicus-Chile Titulo                   15 años de observación satelital sobre el océano del Sur de Chile. Aplicaciones en el rango óptico y de radar Expositor    Cristina Rodríguez, Mariscope Sala:  Sala Multimedia, Centro de Modelamiento Matemático, Beauchef 851, Edificio Norte, Piso 6. Fecha:  Lunes 03 de Diciembre de 2018 Hora:  16:00 horas Participación en Linea:  http://vcespresso.redclara.net/@352109705c115cdd511fb968f9f4ff86# Use Explorer, Firefox o Safari, debe tener instalado Flash...

On Kac’s model, ideal Thermostats, and finite Reservoirs

Event Date: Dec 03, 2018 in CAPDE, Núcleo Modelos Estocásticos de Sistemas Complejos y Desordenados, Seminars

Abstract:   In 1956, Mark Kac introduced a stochastic model to derive a Boltzmann-like equation. Like the space-homogeneous Boltzmann’s  equation, Kac’s equation is ergodic with centered Gaussians as the  unique equilibrium state. In this talk, I will introduce Kac’s model, the thermostat used in [1] to guarantee exponentially fast convergence to equilibrium, and sketch the result in [2] how this infinite  thermostat can be approximated by a finite but large reservoir. References: [1]Bonetto, F., Loss, M.,Vaidyanathan, R.:...

Computing the entropy of multidimensional subshifts of finite type

Event Date: Nov 29, 2018 in Dynamical Systems, Seminars

ABSTRACT : Multidimensional subshifts of finite type are discrete dynamical systems as a set of colorings of an infinite regular grid with elements of a finite set A together with the shift action. The set of colorings is defined by forbidding a finite set of patterns all over the grid (also called local rules). The most simple and most considered grids of this type are Z2 and more generally Zd for d = 1. In this case, one can consider a coloring as a bi-dimensional and infinite word on the alphabet A. They are notably involved in statistical...