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.
Online Algorithms with Machine Learned Advice.
Abstract: Machine-learned predictors, although achieving very good results for inputs resembling training data, cannot possibly provide perfect predictions in all situations. Still, decision-making systems that are based on such predictors need not only to benefit from good predictions but also to achieve a decent performance when the predictions are inadequate. Assume that you are given some (machine-learned) information regarding an online problem. It would be desirable to design an online algorithm that incorporates this information...
Satisfying Instead of Optimizing in the Nash Demand Games.
Abstract: The Nash Demand Game (NDG) has been one of the first models (Nash 1953) that has tried to describe the process of negotiation, competition, and cooperation. This model is still subject to active research, in fact, it maintains a set of open questions regarding how agents optimally select their decisions and how they face uncertainty. However, the agents act rather guided by chance and necessity, with a Darwinian flavor. Satisfying, instead of optimising. The Viability Theory (VT) has this approach. Therefore, we...
Models of collective behavior with singular couplings and their hydrodynamic and mean-field limits.
Abstract: TBA
“Cómo la percepción remota ayudó a mejorar nuestra comprensión del sistema geotérmico de El Tatio-La Torta: Nuevos desafíos para la exploración geotérmica en Chile y Sudamérica”
Participación en Línea: http://vcespresso.redclara.net/@352109705c115cdd511fb968f9f4ff86# Use Explorer, Firefox o Safari. Debe tener instalado Flash Player en su navegador.
Enlargements of the Moreau-Rockafellar Subdifferential.
Abstract: The Moreau–Rockafellar subdifferential is a highly important notion in convex analysis and optimization theory. But there are many functions which fail to be subdifferentiable at certain points. In particular, there is a continuous convex function defined on $\ell^2(\mathbb{N})$, whose Moreau–Rockafellar subdifferential is empty at every point of its domain. This talk proposes some enlargements of the Moreau—Rockafellar subdifferential: the sup$^\star$-sub\-differential, sup-subdifferential and symmetric...
Kieffer-Pinsker type formulas for Gibbs measures.
ABSTRACT: In this talk I will present ongoing work regarding new expressions for entropy and pressure in the context of Gibbs measures defined over countable groups. Our starting point will be the Pinsker formula for the Kolmogorov-Sinai entropy of measure preserving actions of orderable amenable groups. Then, we will consider a formula for pressure that was developed by Marcus-Pavlov (2015) and B. (2018). Next, we will review some techniques based on random orderings, mixing properties of Markov random fields, and percolation theory in...
Decisiones curriculares para el desarrollo de la habilidad matemática de argumentar y comunicar en docentes de Educación Básica
RESUMEN La habilidad de argumentar y comunicar en matemática (ACM) es un elemento al que se le ha prestado atención de manera reciente en el currículum nacional a partir de la implementación de las Bases Curriculares (2012), las cuales proponen una reforma curricular estructural que se traduce en nueva fórmula: ejes temáticos, habilidades y actitudes. El presente estudio indagó los elementos que inciden en la toma de decisiones curriculares por parte de docentes para el desarrollo de la habilidad de ACM. En particular, se identificaron y...
Relativistic kinetic theory with applications in astrophysics. & Fundamental solutions of time-fractional evolution equations.
16:00 hrs. Título: Relativistic kinetic theory with applications in astrophysics. Abstract: I will review the relativistic kinetic theory and apply it to two phenomena. The first phenomenon is the accretion of matter around the Schwarzschild black hole, where we calculated its accretion rate. The second phenomenon concerns the dynamics of the kinetic gas for a thin disk in the equatorial plane of the Kerr black hole. In this case, the so-called mixing phenomenon appears, which causes that the gas configuration relaxes to a stationary...
Acciones de grupos localmente desplazantes.
Resumen: Rubin introdujo la noción de grupo localmente desplazante (locally moving) y encontró muchos teoremas de “reconstruccion” del espacio a partir de la acción del grupo. En particular, un grupo admite una unica accion localmente desplazante salvo conjugación. La clase de grupos localmente desplazantes contiene desde grupos muy grandes como Difeos(R) a grupos pequeños, incluso finitamente presentados, como el grupo de Thompson F. Tienen en común, que todos admiten una acción dinámicamente rica. En un trabajo en conjunto con...
