Upcoming workshops

Several GAMM Activity Groups have a some exciting workshops coming up for the next months. Here they are:

* GAMM ANLA workshop in Chemnitz on 26-27 September 2019: https://www.chemnitz-am.de/anla2019/

* GAMM workshop on Computational and Mathematical Methods in Data Science in Berlin on 24-25 October 2019: https://www3.math.tu-berlin.de/numerik/CMMDS19/index.html

* GAMM CSE workshop in Ulm on 21-22 November 2019: https://www.uni-ulm.de/mawi/mawi-numerik/forschung/gamm-cse-workshop-2019/

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Workshop 2019 in Chemnitz

The GAMM activity group on Applied and Numerical Linear Algebra continues its long tradition of annual workshops in September 2019 at the Department of Mathematics of TU Chemnitz in Chemnitz. Special emphasis will be given this year to Linear Algebra Challenges in the Sciences, but all other areas of applied and numerical linear algebra are welcome. The organization committee is looking forward to meeting all interested scientists in Chemnitz.

DateSeptember 26-27, 2019 (Thu-Fri) (Time schedule will be approximately from Thursday 9:00 a.m. to Friday 3:00 p.m.)

Invited Speakers: Alison Ramage (University of Strathclyde, Scotland), Andreas Frommer (Bergische Universität Wuppertal, Germany), Reinhold Schneider (TU Berlin, Germany)

Deadlines: 15th of July, 2019 for abstracts

Fees: None

Registration: Please register under www.chemnitz-am.de/anla2019/registration.php and submit your abstracts afterwards under www.chemnitz-am.de/anla2019/abstract.php

For more information see www.chemnitz-am.de/anla2019/

GAMM ANLA Workshop 2018

The 18th GAMM ANLA Workshop was held from October 10 to 12, 2018, at the Backagårdens Kurs & Konferenscenter, Höör, Sweden. The scientific organizers were Philipp Birken (Lund University) and Elias Jarlebring (KTH Stockholm), and the local organizing committee from Lund University consisted of Philipp Birken, Claus Führer, and Lea Versbach. The workshop was well attended, with 42 participants from 9 countries.

The special emphasis of the workshop on linear algebra challenges in optimization was reflected in the three plenary talks of the invited speakers. Anders Forsgren (KTH Stockholm) gave a survey of how to solve symmetric systems of linear equations arising in optimization. In particular, he discussed how to deal with ill-conditioning that is inherent in augmented systems that occur in interior point methods. He also presented a recent application of interior point methods for optimization problems in intensity-modulated radiation therapy. Maya Neytcheva (Uppsala University) focussed on the deflation of small eigenvalues and corresponding eigenvectors in Krylov subspace methods. She showed how to compute all eigenvalues of Toeplitz matrices (up to machine accuracy) based on sampling the matrix symbol, and discussed approaches for computing the eigenvectors. Pontus Giselsson (Lund University) presented a general framework for analyzing the convergence of various optimization algorithms for large-scale convex optimization.

In addition to the three plenary talks there were 26 talks on a wide variety of topics in applied and numerical linear algebra given by participants. For example, Ion Victor Gosea (MPI Magdeburg) presented the application of several numerical linear algebra tools to improve the algorithmic cost of Loewner interpolation in model order reduction. Lana Perisa (EPFL) talked about techniques to low-rank recompression techniques for Hadamard products arising in iterative methods, such as the Lanczos method and randomized algorithms. Lea Versbach (Lund University) presented work on multigrid preconditioners for discontinuous Galerkin methods, using optimized Runge-Kutta and W-smoothers. Many talks were devoted to numerical software, with Python and Julia featuring prominently as popular programming languages. The workshop schedule is available here: Lund2018.

During the business meeting, Jörg Liesen and Stefan Güttel were re-elected as chair and vice-chair, respectively, of the GAMM ANLA activity group for a new 3-year term starting January 1, 2019. The GAMM ANLA Workshop 2019 is planned to take place at TU Chemnitz.

GAMM_ANLA_18_Backagården

Section report on the GAMM Annual Meeting 2018

The 89th Annual Meeting of the GAMM took place at the Technische Universität München on 19-23 March 2018. This was a highly enjoyable conference in a picturesque (and snowy!) city, at the impressive venue of the TU.

A highlight of the conference was the session “Applied and Numerical Linear Algebra“, expertly organised by Iveta Hnetynkova and Robert Luce. This stream featured 36 interesting and wide-ranging talks, many of them by members of the GAMM Activity Group, spanning three days of the meeting. For example, Petr Tichý described bounds of the residual norm for ideal GMRES using the field of values of the given matrix and its inverse, Iveta Hnetynkova discussed iterative methods for inverse problems containing additive noise, and Daniel Kressner surveyed results on Krylov subspace methods for updating matrix functions. Zdeněk Strakǒs gave a fascinating insight into operator preconditioning and decomposition of Hilbert spaces, and Tessa Uroić outlined a selective algebraic multigrid algorithm for coupled pressure-velocity systems arising from the Finite Volume Method. It was a pleasure hearing about state-of-the-art research in these fields, as well as many others.

Linear algebra also featured prominently in other parts of the conference, such as within the minisymposium “PDE Constrained Optimization under Uncertainty”, as well as a number of the plenary lectures, which showcased the importance of our subject area for a range of applications. Overall this was a highly informative and well-organised meeting, with research in linear algebra playing a key role in the success of the conference.

John Pearson (University of Edinburgh)

GAMM ANLA Workshop 2017

Der 2017 Workshop unserer Activity Group fand am 7.9. und 8.9. an der Universität zu Köln statt (örtliche Organisatoren: Axel Klawonn, Martin Kühn, Martin Lanser und Sabine Musielack-Erle). Ein spezieller Fokus lag dieses Mal auf dem Thema High Performance Computing. Dieses Thema wurde insbesondere von den Hauptvortragenden Pierre Gosselet (LMT Cachan / Université Paris-Saclay, Frankreich), Oliver Rheinbach (Technische Universität Bergakademie Freiberg) und Wim Vanroose (Universiteit Antwerpen, Belgien) näher beleuchtet.

Das volle Programm des Workshops steht zum Download bereit: Schedule  Abstracts

DS7_0993

GAMM ANLA Workshop 2016

Der 2016 Workshop unserer Activity Group fand am 15.9. und 16.9. an der TU Hamburg-Harburg statt (Organisatoren: Sabine Le Borne und Jens Zemke). Ein spezieller Fokus lag auf Herausforderungen der Linearen Algebra im Bereich des Maschinellen Lernens. Dieses Thema wurde insbesondere von den Hauptvortragenden Bart de Moor (Leuven), Efstratios Gallopoulos (Patras) und Philipp Henning (MPI Tübingen) näher beleuchtet.

Das volle Programm des Workshops steht hier hier zum Download bereit.

participants

 

GAMM ANLA Workshops 2001-2015

Since its establishment in 2001, the GAMM Activity on Applied and Numerical Linear Algebra has run an annual workshop with invited speakers and contributed talks, as well as poster sessions. Here is a list of the workshops from 2001 until 2015, with (wherever available) links to the meeting webpages and scientific programmes:

Magdeburg 2015 [Programme]

Barcelona 2014 [Programme]

Wuppertal 2013

Chateau Liblice 2012 [Programme]

Bremen 2011 [Programme]

Novi Sad 2010

Zurich 2009

Hamburg-Harburg 2008

Harrachov 2007

Düsseldorf 2006

Dresden 2005

Hagen 2003

Braunschweig 2003

Bielefeld 2002

Berlin 2001