News and recent events

  • June 2022: Ignacio Muga (Pontificia Universidad Católica de Valparaíso, Chile) visited us and gave a talk at the Applied Mathematics seminar series as part of his UK tour supported by the LMS Scheme 2 grant.
  • June 2022: speaking at the workshop Interplay of discretization and algebraic solvers: a posteriori error estimates and adaptivity at INRIA Paris.
  • May 2022: participating in the Thematic Programme on Computational Uncertainty Quantification and speaking at the workshop "Approximation of high-dimensional parametric PDEs in forward UQ" at the ESI in Vienna.
  • April 2022: speaking about our work on adaptive stochastic collocation FEM at the workshop "Adaptivity, High Dimensionality and Randomness" at The Erwin Schrödinger International Institute for Mathematics and Physics (ESI) in Vienna.
    Talk recording
  • New preprint: in a joint work with David Silvester, we have completed the second part in the series of two papers on the error estimation and adaptivity for stochastic collocation FEM. The new preprint discusses a multilevel approximation strategy that employs individually tailored spatial discretisations across an adaptively enriched set of collocation points.
    Preprint on arXiv
  • Software release: the latest update to Stochastic T-IFISS has been released. The update contains recent developments including a posteriori error estimation and adaptive algorithms for computing multilevel stochastic Galerkin approximations of steady-state diffusion problems with parametric uncertainty in coefficients.
    Link to the software
  • November 2021: giving a talk on a posteriori error estimation and adaptivity in stochastic finite element methods at Bath Numerical Analysis Seminar.
  • November 2021: speaking at the NASPDE workshop.
  • September 2021: research visit by David Silvester (University of Manchester). We have completed a new preprint (joint work with Feng Xu) developing a general adaptive solution strategy for stochastic collocation FEM. This strategy relies on novel reliable a posteriori error estimates proposed in this work.
    (to appear in SIAM J. Sci. Comp.)
    Preprint on arXiv
  • June 2021: speaking at the Minisymposium in memory of Francisco-Javier Sayas within the CEDYA/CMA 2020 congress.
    Talk slides
  • May 2021: giving a talk on adaptive stochastic Galerkin FEM at the Research Seminar of the Mathematics Department at Brunel University London.
    Talk slides
  • New publication: in a joint with Dirk Praetorius and Michele Ruggeri we have analysed convergence and rate optimality of adaptive multilevel stochastic Galerkin FEM applied to elliptic PDEs with parametric or uncertain inputs.
    (Published online in IMA J. Numer Anal.)
    Link to the paper      Preprint
  • February 2021: congratulations to Rawin Youngnoi who has successfully defended his PhD Thesis "Preconditioning techniques for elliptic partial differential equations with random data".
  • New preprint: together with Daniel Loghin and Rawin Youngnoi we have studied a class of truncation preconditioners for stochastic Galerkin discretisations of parametric elliptic PDEs: we have performed spectral analysis of the preconditioned matrices and established optimality of the preconditioners with respect to discretisation parameters.
    (published in SIAM J. Sci. Comput.)
    Link to the paper      Preprint on arXiv
  • New preprint: together with Dirk Praetorius and Michele Ruggeri we have analysed a novel a posteriori error estimator for multilevel stochastic Galerkin approximations. We have also proposed, implemented, and empirically compared three adaptive algorithms driven by this error estimator for solving elliptic PDEs with parametric or uncertain inputs.
    (Published in SIAM/ASA J. Uncertain. Quantif.)
    Link to the paper      Preprint on arXiv
  • 12 February 2020: Carolina Urzua Torres (University of Oxford) visited us and gave a talk at the Optimisation & Numerical Analysis Seminar.
  • 30 January 2020: Kody Law (The University of Manchester) visited us and gave a talk at the Applied Mathematics Seminar.
  • January 2020: research visit by Michele Ruggeri (Vienna University of Technology).
  • 14 November 2019: Gabriel Barrenechea (University of Strathclyde) visited us and gave a talk at the Applied Mathematics Seminar.
  • September 2019: speaking at the RMMM 2019 conference in Vienna; visiting the research group of Dirk Praetorius at Vienna University of Technology.
  • New preprint: together with Leonardo Rocchi and David Silvester we wrote a short review paper about T-IFISS - a MATLAB toolbox for studying adaptive finite element solution algorithms for deterministic and parametric elliptic PDEs. (Published in the special issue "Development and Application of Open-Source Software for Problems with Numerical PDEs" of Comput. Math. Appl.)
    Link to the paper      Preprint on arXiv
  • June 2019: attending two remarkable conferences, MAFELAP 2019 at Brunel University (Uxbridge, UK) and the Biennial Numerical Analysis Conference at the University of Strathclyde (Glasgow, UK).
  • May 2019: congratulations to Leonardo Rocchi who has successfully defended his PhD Thesis "Adaptive algorithms for partial differential equations with parametric uncertainty".
  • 25-26 April 2019: together with Daniel Loghin and Kris van der Zee we organised the workshop "Scientific computation using machine-learning algorithms: recent mathematical advances and applications" at the University of Nottingham.