IMA Numerics - Caleta Numérica

We meet on Fridays at 16:00 pm in room IMA Sala Aula of our institute. You can also join us virtually using the following link: https://meet.google.com/ibk-hrqi-xbj.

Caleta Numérica

Seminar on Numerical Analysis and Applied Mathematics at Valparaíso

Join us on Fridays at 16:00 pm (GMT-4), by clicking on the following link https://meet.google.com/ibk-hrqi-xbj.

If you are interested in giving a talk, please contact : paulina.sepulveda@pucv.cl or ignacio.muga@pucv.cl or juan.cardenas@pucv.cl

Upcoming Seminar 2026

Confirmed speakers

Sergio Rojas, School of Mathematics, Monash University, Melbourne, Australia - Marzo 27, 2026.
Michael Karkulik, Universidad Técnica Federico Santa Maria, Viña del Mar, Chile - Septiembre 4, 2026.
Ignacio Muga, Instituto de Matematicas, PUCV, Chile - TBD, 2026.
Jessika Camaño, Universidad Católica Santísima Concepción, Concepción, Chile - Octubre 2, 2026.
Patrick Vega, Universidad de Santiago de Chile, Santiago, Chile - Octubre 9, 2026.
Cristian Inzunza, Departamento de Ciencias, Universidad Catolica de la Santisima Concepcion - Octubre 16, 2026.
Manuel Solano, Universidad de Concepción, Concepción, Chile - Noviembre 6, 2026.
Manuel Sanchez, Universidad Católica, Santiago, Chile - Noviembre, 2026.
Rodrigo Vejar, Universidad de la Serena, Chile - Diciembre, 2026.

Numerical schemes for nonlinear wave equations with memory, delay, and/or fractional damping effects

Rodrigo Véjar

Departamento de Matemáticas

Universidad de la Serena

Serena, Chile

Viernes 4 de Diciembre 2026, 16:00 Chile, room Sala Aula IMA and via Meetshttps://meet.google.com/ibk-hrqi-xbj

TBD

Manuel Sánchez

Instituto de Ingenieria Matemática y Computacional

Pontificia Universidad Católica de Chile

Santiago, Chile

Viernes 27 de Noviembre 2026, 16:00 Chile, room Sala Aula IMA and via Meetshttps://meet.google.com/ibk-hrqi-xbj

Numerical approximation for a fluid flow problem arising from reverse osmosis modeling in water desalination

Manuel Solano

Departamento de Ingenierı́a Matemática,

Universidad de Concepción,

Concepción, Chile

Viernes 6 de Noviembre 2026, 16:00 Chile, room Sala Aula IMA and via Meetshttps://meet.google.com/ibk-hrqi-xbj

An adaptive superconvergent mixed finite element method for exactly symmetric linear elasticity based on local residual minimization

Patrick Vega

Departamento de Matemática y Ciencia de la Computación

Universidad de Santiago de Chile

Santiago, Chile

Viernes 9 de Octubre 2026, 16:00 Chile, room Sala Aula IMA and via Meetshttps://meet.google.com/ibk-hrqi-xbj

A Mixed Finite Element Method Based on Pseudostress and Stream-Function for the Navier-Stokes Problem in 2D

Jéssika Camaño

Departamento de Matemática y Fı́sicas Aplicadas,

Universidad Católica de la Santı́sima Concepción,

Concepción, Chile

Viernes 2 de Octubre 2026, 16:00 Chile, room Sala Aula IMA and via Meetshttps://meet.google.com/hvr-bwsc-ucx

Space-time finite element interpolation of non-smooth functions satisfying boundary conditions

Michael Karkulik

Departamento de Matematica,

Universidad Tecnica Federico Santa Maria,

Valparaiso, Chile

Viernes 4 de Septiembre 2026, 16:00 Chile, room Sala Aula IMA and via Meetshttps://meet.google.com/rvk-qpxk-qyo

Approximations of PDEs using Neural Networks

Ignacio Muga

Instituto de Matematicas,

Pontificia Universidad Catolica de Valparaiso,

Valparaiso, Chile

TBD 2026, 16:00 Chile, room Sala Aula IMA and via MeetsTBD

A five-field mixed formulation for the fully dynamic Biot–Brinkman model

Cristian Inzunza

Departmento de Ciencias,

Universidad Católica de la Santísima Concepción

Concepcion, Chile

October 16, 2026, 16:00 Chile, room Sala Aula and via MeetsTBD

A Posteriori Error Estimation for Neural Network Approximations of PDEs

Sergio Rojas

School of Mathematics, Monash University,

Melbourne, Australia

Centro Nacional de Inteligencia Artificial (CENIA),

Santiago, Chile

March 27, 2026, 16:00 Chile, room Sala Aula IMA and via Meetsmeet.google.com/izi-mxva-xwa

Upcoming Seminar 2025

Active learning strategies based on arbitrary data and modeling unobserved variables

Juan Manuel Cárdenas

Department of Aerospace Engineering and Sciences,

University of Colorado, Boulder, USA

Link to Abstract

March 10, 2025, 16:30 Chile, room IMA 1-6 and via Zoomhttps://shorturl.at/fSZ28

Upcoming Seminar 2024

Symplectic Hamiltonian HDG methods for Shallow-Water equations

Manuel Sánchez

Pontificia Universidad Católica de Chile, Chile.

Link to Abstract

December 13, 2024, 11:00 Chile, room IMA 2-3 and via Zoomhttps://shorturl.at/fSZ28

Higher Order Positivity Preserving Methods

for Advection-Diffusion-Reaction Equations

Andreas Meister

University of Kassel, Germany

Link to Abstract

December 3, 2024, 11:00 Chile, room IMA 2-3 and via Zoomhttps://shorturl.at/fSZ28

Data-Driven Kernel Matrix Computations:

Geometric Analysis and Scalable Algorithms.

Difeng Cai

Emori University, USA.

Link to abstract

August 16, 2024, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Computational biofluids – a tail of two tails.

Lisa Fauci

Tulane University, New Orleans, Luisiana, USA

Link to abstract

August 8, 2024, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Banach spaces-based mixed finite element methods for the coupled poroelasticity and heat equations

Julio Careaga

Departamento de Matemática

Universidad del Bío-Bío

Concepción, Chile

Link to Abstract

May 10, 2023, 12:20 Chile, room IMA 2-3 and via Zoomhttps://shorturl.at/fSZ28

Seminar 2023

Deep Optics Preconditioner for Pyramid Wavefront Sensor.

Nicolás Hernandez

Pontificia Universidad Católica de Valparaíso, Chile.

Link to Abstract

November 10, 2023, 12:20 Chile, room IMA 2-3 and via Zoomhttps://shorturl.at/fSZ28

PROPAGATOR, stochastic cellular automaton for wildfires: from response to planning

Andrea Trucchia

CIMA Research Foundation, Italy.

Link to Abstract

August 25, 2023, 11:00 Chile, via Zoom https://shorturl.at/fSZ28

Matemática computacional para tejidos blandos

Nicolás Barnafi

Pontificia Universidad Católica de Chile, Chile.

Link to Abstract

July 7, 2023, 11:00 Chile, room IMA 2-3 and via Zoomhttps://shorturl.at/fSZ28

Reflectionless Discrete Analytic Perfectly Matched Layers for Higher-Order Finite Difference Schemes

Manuel Sánchez

Pontificia Universidad Católica de Chile, Chile.

Link to Abstract

June 30, 2023, 11:00 Chile, room IMA 2-3 and via Zoomhttps://shorturl.at/fSZ28

Sobre métodos multiescala generalizados para flujo en medios porosos complejos y sus aplicaciones

Luis Contreras

Universidad Nacional de Colombia, Colombia.

Link to Abstract

April 14, 2023, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Graph-grammar based algorithm for asteroid tsunami simulations

Paweł Maczuga

AGH University of Science and Technology, Poland.

Link to Abstract

March 24, 2023, 11:00 Chile, room IMA 2-3 and via google meet https://meet.google.com/viw-rqds-ikc

Seminars 2022

A pseudo-spectral time-domain method for acoustic wave propagation in dispersive and power-law dissipative media

Otilio Rojas

Barcelona Supercomputing Center, Spain.

Link to Abstract

December 16, 2022, 12:00 Chile, room IMA 2-3

A deep double Ritz method for solving partial differential equations

Carlos Uriarte

Basque Center for Applied Mathematics and UPV/EHU, Spain.

Link to Abstract

November 11, 2022, 12:00 Chile, room IMA 2-3 and via google meet https://meet.google.com/viw-rqds-ikc

Space-time residual minimization with efficient linear solver based on matrix compression

Marcin Łoś

AGH University of CIencias and Technology, Poland.

Link to Abstract

September 30 , 2022, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

On Kato's smoothing effect for a n-dimensional extension of the Zakharov-Kuznetsov equation

Argenis Méndez

Pontificia Universidad Católica de Valparaíso, Chile.

Link to Abstract

May 25 , 2022, 16:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Splitting for non-stationary Maxwell equations with absorbing boundary conditions

Pablo Venegas

Universidad del Bío Bío, Chile.

Link to Abstract

April 1st , 2022, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Splitting for non-stationary Maxwell equations with absorbing boundary conditions

Marcin Łoś

AGH University of Science and Technology, Poland.

Link to Abstract

March 18 , 2022, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Concurrent algorithms for integrating three-dimensional B-spline

functions into machines with shared memory such as GPU

Maciej Wozniak

AGH University of Science and Technology, Poland.

Link to Abstract

March 16 , 2022, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Seminars 2021

First-Order Time Stepping schemes for sixth-order Cahn-Hilliard type equations modeling microemulsions

Natasha S. Sharma

The University of Texas at El Paso, USA.

Link to abstract

November 12 , 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Space-time finite elements for the optimal control of parabolic equations

Michael Karkulik

Universidad Técnica Federico Santa María, Chile.

Link to abstract

October 22nd, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Robust, explicit, general a posteriori error estimators for partial differential equations with nearly singular solutions

Difeng Cai

Emori University, USA.

Link to abstract

October 15st, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Time marching DPG scheme and adaptivity for transient partial differential equations

Judit Muñoz-Matute

The University of Texas at Austin, USA.

Link to abstract

October 1st, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Descomposiciones y normas multilevel en espacios de Sobolev de órdenes negativos

Thomas Führer

Pontificia Universidad Católica de Chile, Chile.

Link to abstract

September 24, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Estabilidad global de flujo de Couette en 2D por encima del límite de estabilidad energético

Federico Fuentes

Pontificia Universidad Católica de Chile, Chile.

Link to abstract

August 20, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

The Non-Linear Petrov-Galerkin Method for the Convection-Diffusion Equation

Sarah Roggendorf

University of Cambridge, UK.

Link to abstract

June 18, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

El método DPG para elementos poliedrales y aplicaciones en problemas lineales y no lineales

Jaime David Mora Paz

PhD en Ciencia, Ingeniería y Matemáticas Computacionales

Link to abstract

May 28, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

An approach for investigating eigenvector localization

Jeff Ovall

Portland State University, Or. USA

Link to abstract

May 07, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Deep neural network driven self-adaptive hp finite element method

Maciej Paszynski

Department of Computer Sciences, AGH University of Science and Technology, Krakow, Poland

Link to abstract

April 30 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Refined Isogeometric Analysis: A solver-based discretization.

Daniel García

Institute of Environmental Assessment and Water Research, Spain.

Link to abstract

April 16, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Frequency-explicit a posteriori error estimates for finite element discretizations of Maxwell's equations.

Patrick Vega

Inria Sophia Antipolis - Méditerranée Research Centre, Valbonne, France

Link to abstract

April 9 , 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

A finite element based Deep Learning solver for parametric PDEs

Carlos Uriarte Baranda

Basque Center for Applied Mathematics, UPV/EHU, Spain

Link to abstract

March 26, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Un método DPG para la ecuación de onda

Francisca Álvarez Toledo

Universidad Técnica Federico Santa María

Link to abstract

March 19, 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

The use of Genetic Algorithms and Multi-Objective

Evolutionary Algorithms in real problems

Elisabete Alberdi Celaya

University of the Basque Country, Spain

Link to abstract

March 12 2021, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Past Seminars 2020

Geophysical surface-flow modeling and simulation: from tsunamis to debris flows.

David L George

US Geological Survey (USGS), USA

Link to abstract

November 13, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

An unfitted HDG method for a semi-linear elliptic problem arising from nuclear fusion reaction

Manuel Solano

Universidad de Concepción, Chile

Link to abstract

September 25, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Advanced computational modelling in the design of new cardiac radiofrequency ablation strategies

Luca Gerardo-Giorda

Johannes Kepler University Linz, Austria

Link to abstract

September 11, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

A Finite Element Method on Exotic Meshes

Jeffrey S. Ovall

Portland State University, OR, USA

Link to abstract

September 4, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Optimal Quasi-diagonal Preconditioners for Pseudodifferential Operators of Order Minus Two

Thomas Führer

Pontificia Universidad Católica de Chile

Link to abstract

August 14, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

El Modelo de Olas (Water-Waves), como ejemplo general de un Sistema de EDP, de Frontera Libre, para Fluidos Incompresibles sin Viscosidad

Juan Carlos Lopez Ríos

Yachay Tech, Ecuador

Link to Abstract

June 26, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Bayesian Inversion

Oscar Rodríguez Melendez,

Basque Center for Applied Mathematics, Spain

Link to Abstract

June 19, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

A Locking-Free DPG Scheme for Timoshenko Beams

Thomas Führer, Carlos García, (PUCC) and Norbert Heuer

Link to Abstract

June 12, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Guaranteed error estimates for high-frequency Helmholtz problems

Théophile Chaumont-Frelet, Inria project-team Atlantis

Link to Abstract

June 5, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

On the unreasonable effecctiveness of

Sinkhorn algorithm

Gonzalo Mena, Harvard University, USA

Link to Abstract

May 22, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Data-Driven Structured Matrix Approximation by Separation and Hierarchy

Difeng Cai, Emory University, USA

Link to Abstract

May 15, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Conforming Galerkin schemes via traces

Norbert Heuer, Pontificia Universidad Católica de Chile

Link to Abstract

May 8, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

A posteriori error estimates for nonlinear optimal control problems

Francisco Fuica, Universidad Técnica Federico Santa María

Link to Abstract

April 24, 14:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Collective behavior of biological systems inferred from the Maximum Entropy Principle

Rodrigo Cofré, Universidad de Valparaíso

Link to Abstract

April 17, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Rapid Inversion of Resistivity Measurements Using Deep Learning

Mostafa Shariari (Software Competence Center Hagenberg, Austria), D. Pardo, A. Picon, S. Ossandon, and C. Torres-Verdín

Link to Abstract

April 3, 15:00 Chile, via google meet https://meet.google.com/viw-rqds-ikc

Space-time least squares finite elements for parabolic equations and applications

Michael Karkulik (USM Valpo) & Thomas Führer (PUC Santiago)

Link to Abstract

Friday 27, March, via https://meet.google.com/viw-rqds-ikc

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