The Manchester Numerical Linear Algebra group was very active in 2015. This post summarizes what we got up to. Publications are not included here, but many of them can be found on MIMS EPrints under the category Numerical Analysis.

## Software

We continue to make our software available. Increasingly this is done on on GitHub: Deadman, Higham, Relton, Sego, Tisseur, Zhang. We also put MATLAB software on MATLAB Central File Exchange and on our own web sites, e.g., the Rational Krylov Toolbox (RKToolbox).

## PhD Students

New PhD student Matthew Gwynne joined the group in January 2015, sponsored partly by Arup.

New PhD students Massimiliano Fasi (supported by a Presidential Doctoral Scholarship), Jundong Li (supported by The MathWorks), and Mante Zemaityte, joined the group in September 2015.

Mario Berljafa and Weijian Zhang served as Treasurer and Webmaster, respectively, of the Manchester SIAM Student Chapter, 2014-2015. For 2015-2016, Weijian Zhang is President, Mante Zemaityte is Vice President, Matthew Gwynne is Secretary, and Mario Berljafa is treasurer. Massimiliano Fasi is webmaster.

## Postdoctoral Research Associates (PDRAs)

Scott Ladenheim joined the group as a PDRA in August 2015. He is working with Milan Mihajlovic in the School of Computer Science.

Mary Aprahamian became a PDRA in October 2015 after submitting her PhD thesis.

Edvin Deadman moved to a position with NAG (Manchester) in May 2015.

Leo Taslaman moved to a position with COMSOL (Stockholm) in August 2015.

Jennifer Pestana moved to a Lectureship at the University of Strathclyde in October 2015.

Vanni Noferini moved to a Lectureship at the University of Essex in September 2015.

Vedran Sego worked with Francoise Tisseur, September–October, 2015.

## Presentations

Members of the group gave presentations (talks or posters) at the following conferences and workshops.

SIAM UKIE Meeting 2015, January 8, 2015, University of Bath, UK: Berljafa, Mower.

LMS Tropical Mathematics and its Applications workshop, Manchester, January 23, 2015: Tisseur.

SIAM Student Chapter Delft: Student Krylov Day 2015, February 2, 2015: Berljafa.

SIAM Conference on Computational Science & Engineering, Salt Lake City, March 14-18, 2015: Berljafa, Higham, Pestana, Relton, Zhang.

25 Years of Innovative Computing Workshop, UT Knoxville, March 31-April 2, 2015: Hammarling, Tisseur.

The Joint British (Applied) Mathematical Colloquium 2015, Cambridge, UK, March 30-April 2, 2015: Guettel.

Conference in Honor of Volker Mehrmann “Numerical Algebra, Matrix Theory, Differential-Algebraic Equations, and Control Theory”, TU Berlin, May 6-9 2015: Noferini, Perez, Tisseur.

Birmingham Young Mathematician Colloquium, University of Birmingham, 13th May 2015: Berljafa.

Postgraduate Summer Research Showcase, The University of Manchester, June 5, 2015: Berljafa, Zhang.

Gene Golub SIAM Summer School 2015, RandNLA: Randomization in Numerical Linear Algebra, Delphi, Greece, June 15-26, 2015: Berljafa, Fasi.

International Conference on Preconditioning Techniques for Scientific and Industrial Applications, June 17-19 2015, Eindhoven, The Netherlands: Pestana.

26th Biennial Conference on Numerical Analysis, Glasgow, June 23-26, 2015: Higham, Noferini, Perez, Pestana, Relton.

GAMM Workshop on Applied and Numerical Linear Algebra, Magdeburg, Germany, July 9-10, 2015: Šego, Strabić.

The International Congress on Industrial and Applied Mathematics (ICIAM), August 10-14, 2015, Beijing, China: Guettel, Noferini, Pestana.

Applied Harmonic Analysis and Sparse Approximation, Oberwolfach, Germany, August 16–22, 2015: Lotz.

New Directions in Numerical Computation, Oxford, August 25-28, 2015: Guettel, Higham, Relton, Strabić.

International Workshop on Eigenvalue Problems: Algorithms; Software and Applications, in Petascale Computing September 14-16, 2015, Tsukuba, Japan: Tisseur.

Mathematics Research Students’ Conference 2015, University of Manchester, September 30, 2015: Berljafa, Zhang.

Workshop on Matrix Equations and Tensor Techniques, Bologna, Italy, September 21-22, 2015: Strabić.

SIAM Conference on Applied Linear Algebra, Atlanta, October 2015: Aprahamian, Berljafa, Deadman, Fasi, Higham, Hook, Noferini, Perez, Relton, Tisseur.

## Conference and Workshop Organization

Oliver Dorn and Martin Lotz organized the workshop Compressive Sensing and Sparsity: Theory and Applications in Tomography, November 12-13, 2015.

Françoise Tisseur served as member of the organizing committee for the SIAM Conference on Applied Linear Algebra, Atlanta, October 2015.

Christopher Mower, Mario Berljafa, and Weijian Zhang were on the organizing committee of the Manchester SIAM Student Chapter conference, May 2, 2015.

Two minisymposia were organized:

- James Hook: Matrix Scaling – Theory and Algorithms at the SIAM Conference on Applied Linear Algebra, Atlanta, October 2015.
- Edvin Deadman, Nick Higham and Sam Relton: Recent Advances in Matrix Functions at the SIAM Conference on Applied Linear Algebra (2-parts), Atlanta, October 2015. All the presentations (slides and audio) can be viewed at SIAM Presents: Part I, Part II. See also a blog post on the minisymposium by Sam Relton. Here are two photos of the speakers and organizers.

## Visitors

Vedran Sego visited the group throughout 2015.

Peter Kandolf is visiting the group from September 2015 to March 2016.

Tomas Gergelits is visiting the group from October 2015 to March 2016.

## Knowledge Transfer

In the Knowledge Transfer Partnership with Sabisu, involving KTP Associate Tim Butters, Stefan Guettel, Nick Higham, and Jon Shapiro (School of Computer Science), an alarm management system has been developed and launched as a product.

MSc student Chris Mower did a dissertation project “Shrinking for Restoring Definiteness” sponsored NAG and worked in the Manchester NAG office.

Mante Zemaityte carried out a summer project sponsored by Arup, working with the Manchester Arup office.

## Recognition and Service

Martin Lotz and his co-authors won the inaugural 2015 best paper prize for the journal Information and Inference.

Weijian Zhang won first place in the presentation prize at the 2015 Mathematics Research Students’ Conference, University of Manchester, September 30, 2015.

Nick Higham and Natasa Strabić won best poster prize at the SIAM Conference on Applied Linear Algebra, Atlanta, October 2015, for their poster “Anderson Acceleration of the Alternating Projections Method for Computing the Nearest Correlation Matrix”.

Françoise Tisseur served as

- Vice-President of the UK & Republic of Ireland SIAM Section, 2014-2015, and
- Program Director of the SIAM Activity Group on Linear Algebra, 2013-2015.