Noticias en español
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.
Functional inequalities, flows, symmetry and spectral estimates
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
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
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
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
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...
La reflexión docente ante el desempeño de los estudiantes en la evaluación de sus aprendizajes matemáticos
Resumen: Este trabajo se enmarca en un enfoque sobre reflexividad (Shön, 1998), su principal propósito es describir las prácticas reflexivas de los docentes cuando analizan desempeños de aprendizaje matemático de sus estudiantes. Se usó la técnica de pensamiento en voz alta para registrar y detectar las reflexiones de seis docentes de la región Metropolitana mientras analizaban los desempeños de sus estudiantes al corregir una evaluación de aprendizaje. Posteriormente, se usó un análisis de contenido para levantar categorías que permitieran...
Prophet Secretary Through Blind Strategies
Abstract: In the classic prophet inequality, a problem in optimal stopping theory, samples from independent random variables arrive online. A gambler that knows the distributions, but cannot see the future, must decide at each point in time whether to stop and pick the current sample or to continue and lose that sample forever. The goal of the gambler is to maximize the expected value of what she picks and the performance measure is the worst case ratio between the expected value the gambler gets and what a prophet, that sees all the...
