Noticimat 13

Seminarios

Hora: 12:30 (CDMX) 

Enlace de transmisión: https://bluejeans.com/789853847

Ponente: Dr. Javier Vazquez Corral (Universitat Autònoma de Barcelona)

Título: Perceptually-based gamut mapping

Resumen: In this talk we propose different perceptually-based Gamut Mapping techniques (both for gamut reduction and gamut extension).  Our methods comply with some basic global and local perceptual properties of human vision, producing state of the art results that appear natural and are perceptually faithful to the original material. Moreover, we present a psychophysical evaluation of GEAs specifically for cinema using a digital cinema projector under cinematic (low ambient light) conditions. Finally, we also show how currently available image quality metrics, when applied to the gamut mapping problem, provide results that do not correlate well with users’ choices.

 

Hora: 12:45 (CDMX) 

Enlace de transmisión: https://bluejeans.com/783392129

Lugar: Salón Diego Bricio

Ponente: Pedro Ulises Salazar (estudiante del posgrado en Probabilidad y Estadística)

Título: Comportamiento Asintótico de Controles Sensibles al Riesgo con Descuento. Caso Lineal-Cuadrático-Gaussiano

Resumen: Se presenta la importancia del estudio de controles sensibles al riesgo y la caracterización de la función de valor a través del estudio de las ecuaciones de Hamilton-Jacobi-Bellman.

Es conocido que, para el criterio neutral al riesgo en un horizonte de tiempo infinito, conforme el descuento tiende a cero, la función de valor del costo con descuento,con un factor adecuado, se aproxima a la función de valor del costo promedio.

Se muestra que en el caso de que un sistema controlado evolucione de acuerdo a una difusión lineal y la función de valor tenga costo cuadrático, los criterios sensibles al riesgo siguen un comportamiento análogo al presentado en el caso neutral.

Trabajo en conjunto con Daniel Hernández Hernández (CIMAT).

 

Hora: 15:30 (CDMX) 

Enlace de transmisión: https://bluejeans.com/759804451 

Ponente: Alexandra Seceleanu (U. Nebraska-Lincoln)

Título: Cohomological blowups

Resumen: This talk will introduce the notion of a cohomological blowup of an Artinian Gorenstein algebra. Generally speaking, graded Artinian Gorenstein algebras are algebraic analogues for the cohomology rings of complex algebraic varieties and blowing up is an important operation relating such varieties. The purpose of the talk is to extend this blowing up operation from cohomology rings to the more general class of graded Artinian Gorenstein algebras. We call the result of the blowup operation on Artinian Gorenstein algebras a cohomological blowup. We will present several constructions and properties for the new class of cohomological blowup rings. This is based on joint work with Tony Iarrobino, Pedro Macias-Marques, Chris McDaniel, and Junzo Watanabe.

 

Consulte la web del seminario: https://sites.google.com/cimat.mx/seminario-acga-cimat/ 

 

Hora: 11:00 (CDMX) 

https://app.gather.town/app/LnmmWk41NZHZGJ8m/TeoriaDeConjuntos 

Contraseña: gyta0504

Ponente: Ginestra Bianconi (Queen Mary University)

Título: The topological Dirac operator and the dynamics of topological signals

Resumen: Topological signals associated not only to nodes but also to links and to the higher dimensional simplices of simplicial complexes are attracting increasing interest in signal processing, machine learning and network science. Typically, topological signals of a given dimension are investigated and filtered using the corresponding higher-order Laplacian. In this talk I will cover notable spectral properties of higher-order Laplacians and I will reveal how these properties affect higher-order diffusion and higher-order synchronization dynamics. Moreover, I will introduce the topological Dirac operator that can be used to process simultaneously topological signals of different dimensions. I will discuss the main spectral properties of the Dirac operator defined on networks, simplicial complexes and multiplex networks, and their relation to higher-order Laplacians. Finally I will show how the Dirac operator allows us to define topological synchronization of locally coupled topological signals defined on nodes and links of a network.

 

Hora: 10:00 (CDMX) 

Enlace de transmisión: meet.google.com/kfj-awho-zqt

Ponente: M. en C. Brian Andres Zambrano Luna (CINVESTAV-IPN)

Título: Neural networks and p-adic analysis

Resumen: This talk presents some possible relations between neural networks and p-adic analysis. I will show two well-known real "models" that describe brain regions' behavior. The first one, is a model proposed by Armari S., that can be used to analyze the characteristic of topography organization, e.i. Find active regions. 

In the second one, using the Ising model, the authors study the energy landscape and dis-connectivity graph of some resting-state brain network (RSN) data.

 

Hora: 12:30 (CDMX)  

Enlace de transmisión: https://bluejeans.com/508629789   

Ponente: Christian Genest (McGill University)

Título: Bayesian Hierarchical Modeling of Spatial Extremes.

Resumen: Climate change and global warming have increased the need to assess and forecast environmental risk over large domains and to develop models for the extremes of natural phenomena such as droughts, floods, torrential precipitation, and heat waves. Because catastrophic events are rare and evidence is limited, Bayesian methods are well suited for the areal analysis of their frequency and size. In this talk, a multi-site modeling strategy for extremes will be described in which spatial dependence is captured through a latent Gaussian random field whose behavior is driven by synthetic covariates from climate reconstruction models. It will be seen through two vignettes that the site-to-site information sharing mechanism built into this approach does not only generally improve inference at any location but also allows for smooth interpolation over large, sparse domains.

 

The first application will concern the quantification of the magnitude of extreme surges on the Atlantic coast of Canada as part of the development of an overland flood protection product by an insurance company. The second illustration will show how coherent estimates of extreme precipitation of several durations based on a Bayesian hierarchical spatial model enhances current methodology for the construction, at monitored and unmonitored locations, of IDF curves commonly used in infrastructure design, flood protection, and urban drainage or water management.

 

Hora: 16:00 (GM-6)

Enlace de transmisión: https://bluejeans.com/181486186 

Ponente: Dra. Iris Abril Martínez Salazar, UANL

Título: Diseñando rutas de distribución centradas en el cliente.

Resumen: En esta plática, se hará un recorrido por algunos de los problemas clásicos de ruteo de vehículos, considerando como función objetivo minimizar los tiempos de espera de los clientes para recibir su servicio. Este tipo de problemas se conocen como centrados en el cliente y presentan retos computacionales adicionales al tradicional objetivo de minimizar costos económicos o distancia de viaje.

 

Hora: 09:00 (CDMX)  

Enlace de transmisión: https://bluejeans.com/387784372

Ponente: Cédric Le Texier (U. Toulouse)

Título: Hyperbolic plane curves near the non-singular tropical limit

Resumen: We determine necessary and sufficient conditions for real algebraic curves near the non-singular tropical limit to be hyperbolic with respect to a point, thus generalising Speyer's classification of stable curves near the tropical limit.

In order to obtain the conditions, we develop tools of real tropical intersection theory.  We introduce the tropical hyperbolicity locus and the signed tropical hyperbolicity locus of a real algebraic curve near the non-singular tropical limit, and show that it satisfies a real tropical analogue of convexity. In the case of honeycombs, we characterise the tropical hyperbolicity locus in terms of the set of twisted edges on the tropical limit.

 

Consulte la web del seminario: https://sites.google.com/site/cotterillethan/ethan-cotterill-eng/latin-american-real-and-tropical-geometry-seminar 

Eventos

I Escuela de Primavera en Investigación de Operaciones

 

La Escuela de Primavera en Investigación de Operaciones (EPIO) pretende ser un espacio donde estudiantes avanzados de licenciatura y estudiantes de maestría conozcan las investigaciones y aplicaciones recientes en el campo de la Investigación Operativa además de introducirlos al uso de algunas de las herramientas y técnicas propias del área.

 

Para más información consulta https://epio.eventos.cimat.mx/ 

Sesión programada para el jueves 07 y viernes 08 de abril 2022

 

 

Cursos de capacitación y pláticas para el intercambio de conocimiento entre académicos CIMAT

 

El área de ciencia de datos e inteligencia artificial de la Gerencia de Desarrollo de Software, tiene el placer de invitarlos a sesiones de capacitación y pláticas cortas en tópicos relacionados con proyectos de ciencia de datos, inteligencia artificial y desarrollo de software con la finalidad de conocer y capacitar a personal académico en algunos tópicos de interés. 

 

Estos cursos están dirigidos a  personal académico del CIMAT (Especialistas en cualquier modalidad de contratación, investigadores, cátedras, postdoctorantes,... ), con cupo máximo para 20 interesados en modalidad remota.

 

En caso de interés de alguno de los cursos, por favor confirmar participación al correo  lilianas@cimat.mx antes del día 6 de abril de 2022.  

 

 

 

Valentina Muñoz Porras, Carmen Mares Orozco, Dennis Olvera Torres y Marco Figueroa Ibarra ofrecerán clases de matemáticas a las niñas y niños de la Escuela Primaria "Amado Nervo", ubicada en la colonia Valenciana, Guanajuato, Gto. 

 

Horario: 8:30 a 10:30 am.

Graduados

Nuestras felicitaciones para:

Benito Rodriguez Camejo quien obtuvo el grado de Maestro en Cómputo Estadístico,con la presentación y defensa de su tesis Reducción de Sesgo en Matrices de Covarianza y sus Efectos en Portafolios de Alta Dimensionalidad.

 

Lector Especial, Dr. Rodrigo Macías Páez (CIMAT)

 

El jurado estuvo integrado por la Dra. Graciela María de los Dolores González Farías (CIMAT), Presidente; el Dr. Víctor Hugo Muñiz Sánchez (CIMAT), Secretario y el Dr. Andrés García Medina (CIMAT-CONACYT), Vocal y Director de la Tesis.