Activities

Granada, Spain, May 28-29, 2026

Reliability, maintenance and safety in the data-driven era

Topics of interest include, but are not limited to:

• Data-driven reliability and maintenance.
• Stochastic processes for reliability and failure modelling.
• Condition monitoring, diagnostics, and prognostics.
• Predictive maintenance and digital twins.
• Machine learning and neural networks in reliability engineering.
• Structural health monitoring and sensor system design.
• Uncertainty and sensitivity analysis for safety evaluation of critical structures.
• Value of information analysis for improved decision-making in structural safety.
• Resilience engineering and infrastructure systems management.
• Sustainable maintenance.
• Bayesian methods in reliability and maintenance modelling.
• Partially Observable Markov Processes for Condition-Based Maintenance.
• Deep Learning for Remaining Useful Life (RUL) Prediction.
• Hybrid AI-Statistical Models for Fault Diagnosis.
• Reliability and Maintenance Strategies for Industry 5.0.

More information in the conference web: https://conferences.enbis.org/event/79/overview

Fecha y hora: martes 1 de julio, 12:00

Lugar: Seminario 2, IMAG

Ponente: Andrés Riveros Valdevenito

Title: Monotonicity in Quadratically Regularized Optimal Transport

Abstract: In optimal transport, quadratic regularization is a sparse alternative to entropic regularization: the solution measure tends to have small support. Computational experience suggests that the support decreases monotonically to the unregularized counterpart as the regularization parameter is relaxed. We find it useful to investigate this monotonicity more abstractly for linear programs over polytopes, regularized with the squared norm. Here, monotonicity can be stated as an invariance property of the curve mapping the regularization parameter to the solution: once the curve enters a face of the polytope, does it remain in that face forever? We show that this invariance is equivalent to a geometric property of the polytope, namely that each face contains the minimum norm point of its affine hull. Returning to the optimal transport problem and its associated Birkhoff polytope, we verify this property for low dimensions, but show that it fails for marginals with five or more point masses. As a consequence, the conjectured monotonicity of the support fails in general, even if experiments suggest that monotonicity holds for many cost matrices.

La XIV edición de la Escuela de Educación Matemática Miguel de Guzmán, que organizan la Federación de Sociedades de Profesores de Matemáticas y la RSME, se celebrará este año en Granada en las instalaciones de IMAG y en la Facultad de Ciencias Políticas y Sociología, los días 2, 3 y 4 de julio de 2025 bajo el título “Razonar para Aprender”.

Conferenciante: Alejandro Jímenez Cano

Fecha: Jueves, 26 de Junio a las 12:00.

Lugar: Seminario 1 IMAG

Online: https://meet.google.com/dum-nepu-pzc

Título: Toroidal black holes in four dimensions

Abstract: In this seminar, I will present the explicit construction of a black hole featuring a toroidal event horizon. The exterior geometry is divided into three regions: an outer flat region, an inner flat region with non-trivial topology and an interpolating region containing matter. We will show that the intermediate region is required to achieve a consistent matching of the spacetime geometry. Furthermore, we will prove that violations of the weak energy conditions are required in such a region to sustain the configuration under reasonable regularity assumptions.

Author : Franco Vargas-Pallete, IHES, Paris, Francia

Title : Sobre la existencia de superficies minimas en variedades hiperbólicas de volumen infinito

Location : 20 Junio 2025, Hora 12:30, Seminario 2 de IMAG

Abstract : Discutiremos dos resultados sobre existence de superficies minimas cerradas en variedades hiperbólicas de dimensión 3 y volumen infinito. Primero, provaremos que o bien toda variedade de geometria acotada posee una superficie mínina o existe un ejemplo con una foliación por superficies mínimas cerradas. En la segunda parte discutiremos existencia de superficies minimas compresibles. Basado en trabajo en colaboración con Baris Coskunuzer, Zheng Huand y Ben Lowe.

Author : Marc Nualart (ICMAT)

Title : On the fragility of laminar flow.

Abstract : Steady states of the two-dimensional Euler equations generally come in infinite-dimensional families and play an important role in the long-time dynamics of generic initial data. In this talk we will review several classes of steady states, focusing on laminar flow. We will show steady laminar flow in channels or annulus are shear/radial, while on other generic domains they are structurally rare.

• IMAG Functional Analysis Seminar
• Title: ¿Podemos elegir no elegir en análisis funcional?
• By Esteban Martínez Vañó (UGR)
• Abstract: En esta charla exploraremos las relaciones entre el axioma de elección (o versiones débiles del mismo) y los teoremas clásicos del análisis funcional mostrando que no nos queda otra opción que "elegir elegirlo".

Author :Jorge Ruiz Cases (Universidad Autónoma de Madrid)

Title : Teoría de juegos y EDPs

Abstract : Comenzamos definiendo juegos en los que participarán una o dos personas, los cuales podrán ser deterministas o incluir azar. A cada juego le asociamos un valor que representa el beneficio que se espera lograr (en caso de dos jugadores, el que espera lograr uno de ellos). Tras tomar un límite, este valor verifica que es la solución (en sentido viscoso) de una cierta EDP asociada. Veremos cómo las reglas del juego son las que determinan el operador que gobierna la ecuación.

Una vez familiarizados con cómo plantear estos juegos, describiremos un juego determinista para dos personas, Paul y Carol. Paul pretende permanecer en un conjunto del plano todo el tiempo que pueda, mientras que Carol pretende expulsarlo de dicho conjunto. En cada turno, Paul escoge una dirección en la que va a dar un paso. Después de escoger, Carol le indica en qué sentido dará ese paso. La ecuación asociada a este juego es la de flujo por curvatura media. Observaremos como el juego no es una simple curiosidad, si no que nos permitirá obtener conclusiones que serían más complicadas de obtener a través de la propia ecuación.

Author : Paula Luna Velasco

Title : Patch Evolution in 2D Inhomogeneous Navier–Stokes

Location : Seminario 1, IMAG

Organizer : Seminario de Jóvenes Investigadores

Abstract : The motion of incompressible fluids is described by the Navier–Stokes equations, a fundamental model in mathematical physics. In two dimensions, these equations are globally well-posed for regular initial data, in contrast with the open problem in 3D. In this talk, I will focus on the inhomogeneous two-fluid system, where the fluid regions have different nonnegative densities and may exhibit a small jump in viscosity. Our main interest lies in the well-posedness of the system and in understanding the evolution and regularity of the patch boundary. I will present recent results and techniques that address the key analytical challenges of this problem. This is a joint work with Francisco Gancedo and Eduardo García-Juárez.

Author : Michele Cucuzzella (University of Groningen)

Title : Krasovskii passivity based consensus algorithms

Abstract : In this talk a new passivity concept named Krasovskii passivity will be introduced and novel Krasovskii passivity based control techniques will be presented. Specifically, an output consensus protocol will be presented for Krasovskii passive nonlinear systems affected by external disturbances. The applicability and effectiveness of the proposed methodologies are illustrated by designing controllers for DC power networks, which are validated by experiments.