Group meetings are on Wednesday at 11am in Frank Adams 1. If you would like to give a presentation please contact Stephanie Lai.
Wednesday March 19
Mawussi Zounon will give a talk about PLASMA and the NAG Library.
Wednesday March 27
Xiaobo Liu – TBA
Wednesday April 3
Michael Connolly – TBA
Wednesday March 13
Xuelei Lin from Hong Kong Baptist University
Title: Crank-Nicolson ADI method for space-fractional diffusion equations with non-separable coefficients
Abstract: Alternating direction implicit (ADI) scheme is a popular and efficient solver for linear systems arising from discretization of high-dimension fractional PDEs. However, ADI schemes developed in previous works requires strong assumptions, such as separable coefficients, or even constant coefficients. In this talk, I will introduce our newly developed theory for Crank-Nicolson ADI, which does not require separable-coefficients assumptions. Also, an optimal preconditioning technique is applied to the one-dimensional problems arising from ADI scheme, for which the condition number of the preconditioned matrices are proven to be independent of discretization step-sizes.
Wednesday March 6
Chris Armstrong from Arm
Title: Arm Performance Libraries FFT development
Abstract: In this talk I will give a quick overview of Arm Performance Libraries before describing the work we have undertaken to improve the performance of our Fast Fourier Transform (FFT) functions. I will outline the algorithms we use and our results to date.
Wednesday February 27
Wednesday February 20
Practise talks by Pierre Blanchard and Steven Elsworth
Wednesday February 13
Wednesday February 6
Wednesday January 30
Pierre Blanchard on “Yet Another Fast And Accurate Summation Algorithm”.
Wednesday January 23
Tuesday December 11
Tuesday December 4
Tuesday November 27
Tuesday November 20
Lijing Lin on “Phenotyping immune responses in asthma and respiratory infections using clustering techniques”. An abstract for the talk is available here.
Tuesday November 13
Srikara Pranesh on “Squeezing a Matrix Into Half Precision, with an Application to Solving Linear Systems”.
Tuesday November 6
Elisa Riccietti on “High-order multilevel optimization strategies and their application to the training of artificial neural networks”. Abstract for the talk is available here.
Tuesday October 30
Gain Maria Negri Porzio on “The contour integral approach for the nonlinear eigenvalue problem”.
Tuesday October 23
Nick Higham on “The adjugate matrix”. From the meeting: Notes.
Tuesday October 16
Tuesday October 9
Nick Higham on ”Optimizing the Wilson Matrix”. From the meeting: Notes.
Here is the group photo from the meeting (hires version).
Tuesday October 2
Tuesday September 25
Introductions, new website, and plans for the academic year, including conferences. From the meeting: Notes.