## Numerical Linear Algebra Group Activities 2022

During 2022 the Numerical Linear Algebra Group introduced a new logo, designed by Massimiliano Fasi, former PhD student and Research Associate in the group.

We published interviews with alumni Younes Chahlaoui and Vanni Noferini.

In addition to our papers in journals we published articles in SIAM News:

- The Rational Krylov Toolbox by Stefan Güttel, Part 1, Part 2.
- How to Boost Your Creativity by Nick Higham and Dennis Sherwood

and a book

- How to Be Creative: A Practical Guide for the Mathematical Sciences by Nick Higham and Dennis Sherwood.

The award of the ACM A. M. Turing Award to Jack Dongarra was a highlight.

## PhD Students

Zhengbo Zhou started as a PhD student, working with Nick Higham and Françoise Tisseur.

Xiaobo Liu (Computing Matrix Functions in Arbitrary Precision Arithmetic) and Michael Connolly (*Probabilistic Rounding Error Analysis for Numerical Linear Algebra*) successfully defended their PhD dissertations. Michael is now working as a data scientist at Bet365.

## Postdoctoral Research Associates (PDRAs)

Xiaobo Liu and Bastien Vieuble took up PDRA positions towards the end of the year to work with Nick Higham.

Mantas Mikaitis left the group to take up a lectureship in the School of Computing at the University of Leeds on September 1st. He joined us in 2019 to take up his EPSRC Doctoral Prize Fellowship and he was a PDRA in the group from 2020.

## Presentations at Conferences and Workshops

International Congress of Mathematics (ICM), July 6–14, 2022: Higham, invited sectional talk *Numerical Stability of Algorithms at Extreme Scale and Low Precisions* (slides, video).

A Journey in Numerical Linear Algebra: A Workshop in Honor of Michele Benzi’s 60th Birthday, University of Pisa, June 10–11, 2022: Higham.

Linear Algebra, Matrix Analysis and Applications-ALAMA 2022-ALN2gg, Madrid, 1–3 June 2022: Tisseur.

Householder Symposium XXI on Numerical Linear Algebra, Selva di Fasano, Italy, 12–17 June 2022: Fasi, Tisseur.

Computational Mathematics for Quantum Technologies, Bath, August 1–5, 2022: Güttel.

7th IMA Conference on Numerical Linear Algebra and Optimization, University of Birmingham, June 29–July 1, 2022: Liu, McInnerney.

2022 SIAM Annual Meeting, July 11–15, 2022: Liu.

## Conference and Workshop Organization

Sixteen members of the Group attended a two-day creativity Workshop held in April 2022, facilitated by Dennis Sherwood, an expert in creativity. See this report on the workshop.

Mantas Mikaitis and Nick Higham organized a double minisymposium Understanding and Exploiting Mixed-Precision Accelerators for High-Performance Computing at the SIAM Conference on Parallel Processing for Scientific Computing (PP22) in February 2022. Slides of some of the talks are available.

The conference Advances in Numerical Linear Algebra: Celebrating the 60th Birthday of Nick Higham was held at the University of Manchester, July 6–8, 2022, organized by Stefan Güttel, Sven Hammarling, Stephanie Lai, Françoise Tisseur and Marcus Webb. Most of the talks are available on the NLA Group YouTube channel and links to them are available on the conference web page. Photos are available here.

## Recognition and Service

Jack Dongarra received the 2021 ACM A.M. Turing Award.

Nick Higham was elected Fellow of Royal Academy of Engineering.

Stefan Güttel was awarded the 2023 ILAS Taussky–Todd Prize.

Stefan Güttel was reappointed for another term as a member of the SIAM Membership Committee, 1/1/2023–12/31/2025.

2022 NLA group photo – our first in over two years!https://t.co/r7G5zhSvxr

— Numerical Linear Algebra Group (@nla_grp) May 30, 2022

Authors @nhigham and @noookophile recently published their new book, How to Be Creative: A Practical Guide for the Mathematical Sciences. Read this interview with both authors as they dive into creativity, their techniques, and more: https://t.co/KP1XbrHuez pic.twitter.com/MrJlcSaDND

— SIAM (@TheSIAMNews) May 27, 2022

“Who knew Ax=b would be more important than ever in 2022 and lead to a #Turing Award?” #ISC22 #HPC pic.twitter.com/M3OZmP5vez

— KAUST ECRC (@KAUST_ECRC) May 30, 2022