Numerical Linear Algebra Group

The NLA group members meet each Tuesday at 10:00 am in Frank Adams room 1, Alan Turing building.
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Group photo (hires version)

Group meetings 2011/12

15 May 2012: no group meeting today at 10am. See Fran's talk in the Tropical Mathematics Seminar and Reading Group at 12:00 in FA2.
8 May 2012: Edvin and Nick about "Version control".
1 May 2012: Mary Aprahamian on "The matrix unwinding number".
24 April 2012: Lijing Lin on her recent work on an improved algorithm for fractional matrix powers and the Frechet derivative.
17 April 2012: Natasa Strabic (University of Zagreb) on the Cholesky algorithm for symmetric matrices.
27 March 2012: Francoise Tisseur on "Function of Structured Matrices".
20 March 2012: Edvin Deadman on "A Recrusive Blocked Algorithm for Computing the Matrix Square Root".
13 March 2012: Leo Taslaman on Meerbergen's Q-Arnoldi method and Bai & Su's SOAR algorithm for large quadratic eigenvalue problems.
6 March 2012: Nick Higham on "Org mode - a tool for note taking, task management, producing LaTeX documents and web pages, literate programming, and reproducible research".
28 February 2012: Ruediger Borsdorf on "A Two-Sided Optimization Problem Arising in Chemistry".
21 February 2012: Ramaseshan on "Optimizing sparse matrix vector multiplication using a novel representation".
14 February 2012: Sam Relton: "Frechet derivative for the matrix logarithm and computation of the condition number".
7 February 2012: Yuji Nakatsukasa: "SVD and the symmetric eigenvalue problem".
31 January 2012: Nick Higham on citations
24 January 2012: Marcin Paczkowski (University of Leeds) on "Comparison of one- and two-sided communication paradigms of MPICH2 implementation of MPI".
17 January 2012: Nick Dingle: Communication avoiding in CG.
10 January 2012: No group meeting. Linear Algebra Aspects of Solving PDEs with Random Data workshop.

(Semester 1)
20 December 2011: No group meeting.
13 December 2011: Ramaseshan on "Reducing communication in sparse matrix computations".
6 December 2011: Yuji Nakatsukasa on recent work with Nick on backward stability of iterations for computing the Polar decomposition.
29 November 2011: Ramaseshan Kannan on "A new subspace iteration algorithm for generalized eigenvalue problems".
22 November 2011: Leo Taslaman on triangularization of matrix polynomials.
15 November 2011: Craig Lucas. Abstract: In this talk I will describe the journey we took in implementing Ruediger and Nick's Nearest Correlation Matrix algorithm efficiently in the NAG library. Along the way I'll highlight software and architecture optimizations and how it maps to multicore.
8 November 2011: Nick Higham on Improved Inverse Scaling and Squaring Algorithms for the Matrix Logarithm (joint work with Awad H. Al-Mohy).
1 November 2011: No meeting.
25 October 2011: Advanced Numerical Methods on GPUs". Presentation by Nick Dingle and David Silvester.
18 October 2011: Presentation by Lukas Steiblys.
11 October 2011: Nick Higham on workflow (LaTeX, BibTeX, MATLAB, editing, ...).
4 October 2011: Presentation by Ramashesahn Kannan.
27 September 2011: Introductions, membership (maths societies).

Need to know

Essential information for the group.
Research in Numerical Linear Algebra

Events

NAG seminar,Wednesday 18th January 2012, 1pm, Lecture Theatre F14, Renold Building, Univ. Manchester.
Multicore Demystified by Craig Lucas
An Introduction to CUDA Programming and the NAG Numerical Routines for GPUs by Jacques du Toit
HECToR Supercomputing Service Training.

Members

Group photo (hires version)

Societies

IMA (Institute of Mathematics and its Applications)
ILAS (International Linear Algebra Society)
LMS (London Mathematical Society)
SIAM. SIAM Activity Group on Linear Algebra (SIAG/LA).
UK and Republic of Ireland SIAM Section.
Manchester SIAM Student Chapter
Combined Membership List (AMS, SIAM, MAA)
University of Manchester GPU Club