Dear Colleagues,

We are happy to announce the next webinar in the TDS Webinar series.

Speaker:        Dimitri Breda, University of Udine
Title:               Back and forth between the infinite and the finite: a numerical view of time delay systems

Date & Time: December 2, 2022, Friday @ 4:00 pm (CET), 7:00 am (PDT), 10:00 am (EDT), 11:00 pm (CST)
Registration: https://umich.zoom.us/meeting/register/tJUuf-uoqTwqHNQE6gHe-HFUCcal8EKiED5p
                     The registration is free and takes about 30 seconds. If you experience any issues please email orosz@umich.edu

ABSTRACT: The view of delay differential equations as generators of dynamical systems evolving on function spaces has fostered substantial and essential progress in the study and understanding of these equations since the inspiring works of Krasovskii in the fifties. Of course the price to pay to exploit this enlarged perspective is that of dealing with infinite dimension. On the one hand, the functional analysis of Banach spaces has helped to extend to delay systems well known results holding for ODEs - often with (un)expected difficulties. On the other hand, discretization tools of numerical analysis have entered the scene as a natural way to bring infinite-dimensional objects back to finite ones in view of attaining - hopefully trustworthy approximate - solutions to the considered problems. The talk is about some of the aspects concerned with the interplay between these finite- and infinite-dimensional contexts, mainly in view of numerically addressing questions of stability and bifurcation.

BIOGRAPHY: Dimitri Breda (1974) received the Laurea degree in mechanical engineering from the University of Udine, Italy, in 1998 and the Ph.D. in computational mathematics from the University of Padua, Italy, in 2004. He is now associate professor of numerical analysis at the Department of Mathematics, Computer Science and Physics of the University of Udine, where he established and currently leads the Computational Dynamics Laboratory (CDLab http://cdlab.uniud.it/). His research interests are in the broad field of numerical and applied mathematical analysis, with particular reference to numerical methods for the stability and bifurcation analysis of infinite-dimensional dynamical systems generated by delay and other classes of functional equations, with main applications in control engineering and population dynamics. He is a member of the IFAC working group "Time Delay Systems" (TC 2.2) and serves regularly the IPC of the related IFAC-TDS workshop series.

In the attachment you find a poster with an announcement of lecture. We would appreciate if you could distribute it among your colleagues and students, along with the data to access the seminar.

This webinar series is organized as an activity of the IFAC Working Group on Time Delay Systems, which operates within the Technical Committee of Linear Control Systems of IFAC. The aim of the Working Group is to increase interactions and foster collaborations among researchers interested in time delay systems, not restricting to the systems and control community or to the IFAC Technical Committee. The Working Group focuses on all aspects related to time delay systems: modelling and identification, analysis, filtering and estimation, stability and stabilization, safety, structural properties, robustness, approximation techniques and numerical methods, control schemes and application in process control, vibration control, networked systems, autonomous agents, communication, bio-engineering, economics and other fields.

This year's the program consists of the following speakers:

Henk Nijmeijer - April 1, 16h-17h CET
Sabine Mondié - June 17, 16h-17h CET
Tomás Vyhlídal - September 16, 16h-17h CET
Dimitri Breda - December 2, 16h-17h CET

Every presentation will be followed by a meeting of the IFAC Working Group on Time Delay Systems. Please do not hesitate to contact us if you wish to put some topic on the meeting agenda. Soon we will send the link for the first webinar in the series and more details will be available at the Working Group's website http://timedelaysystems.caltech.edu

A few new things you may find on the website:
- Open Invited Track at the IFAC World Congress 2023 - deadline extended until November 18
- EECI-IGSC Course in 2023 by Emilia Fridman and Pierdominico Pepe
- IFAC Workshop on Time Delay Systems in 2022 - workshop photos posted

Kind regards,

Wim Michiels and Gabor Orosz
Chairs, IFAC Working Group on Time Delay System
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