Erlend Skaldehaug Riis

photo

Department of Applied Mathematics and Theoretical Physics
University of Cambridge
Wilberforce Road
Cambridge, CB3 0WA
United Kingdom
esr34 [at] cam.ac.uk

I am a doctoral student in the Cambridge Image Analysis group and in the Cambridge Centre for Analysis, under the supervision of Prof. Carola-Bibiane Schönlieb. My current research focuses on nonsmooth, nonconvex optimisation and methods in geometric integration, with applications to mathematical imaging and bilevel optimisation.

Prior to Cambridge, I did a Master of Mathematics (MMaths) at the University of Warwick. My master's project was on "Bayesian inverse problems for partial differential equations, and was supervised by Prof. Andrew M. Stuart and Dr. Aretha Teckentrup.

Curriculum Vitae (last updated: 22.02.2019)





Research Interests

Nonsmooth optimisation, Nonconvex optimisation, Geometric integration, Bilevel optimisation, Photoacoustic tomography.

Preprints

  1. E. S. Riis & M. J. Ehrhardt & G. R. W. Quispel & C.-B. Schönlieb
    A geometric integration approach to nonsmooth, nonconvex optimisation

  2. M. J. Ehrhardt & E. S. Riis & E. S. Riis & T. Ringholm & C.-B. Schönlieb
    A geometric integration approach to smooth optimisation: Foundations of the discrete gradient method

Reviewed Journal Papers

  1. R. Gilbert & C. Riis & E. S. Riis
    Stepwise innovation by an oligopoly

    Int. J. Ind. Organ., 61, 413-438. 2018.
    Supplementary material: MATLAB zip download

Upcoming Activities

08/2019Invited speaker: The Sixth International Conference on Continuous Optimization (ICCOPT 2019), Berlin, Germany.
07/2019Speaker at The 10th International Conference on Applied Inverse Problems (AIP 2019), Grenoble, France.
06/2019Invited speaker: The 28th Biennial Numerical Analysis Conference 2019, Strathclyde, UK.
04/2019Speaking at 2nd IMA and OR Society Conference on Mathematics of Operational Research, Birmingham, UK.
03/2019Invitation: CCIMI Retreat, Peaks District, UK.

Previous Talks (invited*)

02/2019*Manifolds and Geometric Integration Colloquia (MaGIC), organised by the University of Bergen and the Norwegian University of Science and Technology, Norway.
02/2019Turing Optimization Club, Alan Turing Institute, London, UK.
02/2019Variational methods and optimization in imaging, Institut Henri Poincaré, Paris, France.
11/2018*Mathematics/Mathematical Physics Seminar, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand.
09/2018*Gradient flows: challenges and new directions, International Centre for Mathematical Sciences (ICMS), Edinburgh, UK.
03/2018*Imaging and Vision from Theory to Applications, University of Siegen, Germany.
11/2017*Cambridge Analysts' Knowledge Exchange Seminar, University of Cambridge, UK.
10/2017*Cantab and CCIMI Research Jam, Cambridge, UK.
05/2017*High Dimensional Mathematics - A Research Conference of the Cantab Capital Institute for the Mathematics of Information - Programme, Isaac Newton Institute, Cambridge, UK.
05/2017*Cambridge 2nd year applied mathematics PhD conference, University of Cambridge, UK.

Posters

05/2018The Mathematics of Machine Learning - A Research Conference of the Cantab Capital Institute for the Mathematics of Information, Isaac Newton Institute, Cambridge, UK.
05/2017High Dimensional Mathematics - A Research Conference of the Cantab Capital Institute for the Mathematics of Information, Isaac Newton Institute, Cambridge, UK.

Research visits

11/2018Invited by Prof. R. McLachlan, Massey University, Palmerston North, New Zealand, November 12-November 30, 2018.
10/2018Invited by Prof. G. R. W. Quispel, La Trobe University, Melbourne, Australia, October 22-November 9, 2018.
03/2017Invited by Prof. R. McLachlan, Massey University, Palmerston North, New Zealand, March 20-March 24, 2017.
03/2017Invited by Prof. G. R. W. Quispel, La Trobe University, Melbourne, Australia, March 13-March 17, 2017.

Teaching activities

University of Cambridge

2017/18Linear Analysis, supervisor.
2016/17Linear Analysis, supervisor.

BI Norwegian Business School

2016/17Summer course in linear algebra and analysis, lecturer.
2015/16Summer course in linear algebra and analysis, lecturer.

University of Warwick

2014/151st year undergraduate core courses, supervisor.