Recent Research Sponsors

Engineering and Physical Sciences Research Council.

London Mathematical Society.


I am a member of the Analysis and Differential Equations Group in Cardiff.

My interests are in operator-theoretic problems for ordinary and partial differential operators, including forward and inverse problems for Maxwell and Schrödinger equations.

My most recent work has concerned:

  • Essential numerical ranges for unbounded operators, with applications to numerics;
  • Spectral problems for non-Hermitian Maxwell and Drude-Lorentz systems.

My recent papers are available under Open Access publication agreements from my Cardiff University web page by clicking on the `publications' tab, as well as on the arXiv.

I have been interested in mathematical software ever since NAG sponsored my PhD; some of my software for eigenvalue problems is available to download.