I am a tenure track assistant professor (biträdande universitetslektor) at the Division of Scientific Computing, Department of Information Technology, Uppsala University, Uppsala, Sweden.

I defended my Ph.D. in scientific computing (numerical analysis) at Uppsala University in 2018 with the thesis "**Matrix-Less Methods for Computing Eigenvalues of Large Structured Matrices**" (full text). I was then a postdoc at Athens University of Economics and Business and Bergische Universität Wuppertal before I received the International postdoc grant (Spring Call 2019, 3.15 MSEK ≈ 340 kUSD) of the Swedish Research Council.

- Spring 2021, Teaching: Data Engineering I, Computer Programming II
- 2021/2022, ILAS2020, Galway, Ireland (postponed)
- Nov. 6-10, 2022, IGA 2020, Banff, Canada (postponed)

My main research interest is spectral analysis of matrix sequences from PDE and FDE discretizations, and other structured matrices (especially Toeplitz-like), using matrix-less methods, the theory of GLT sequences, and other techniques. I especially like non-Hermitian matrix sequences with peculiar spectral behaviour. Some current projects are,

- Parallel-in-Time (PiT): Spectral analysis of associated matrices;
- Fractional derivatives (FDE): Preconditioning for iterative solvers, and spectral analysis of discretization matrices;
- Asymptotic expansion (Matrix-less methods): Eigenvalues, eigenvectors, matrix-valued and multi-variate symbols, diagonal sampling matrices, perfect grids;
- Non-Hermitian symbols and matrix sequences: Spectral analysis of some special banded and non-banded Toeplitz and Toeplitz-like matrix sequences; e.g., \(\{T_n(f)\}_n\) for symbols \(f(z)=-z+1+z^{-1}+z^{-2}+z^{-3}\), \(z\in\mathbb{C}\), \(f(z)=\alpha z^{-r}+\beta+\gamma z^s\), \(r\neq s\in\mathbb{N}\), \(\alpha,\beta,\gamma\in\mathbb{C}\), or \(f(z)=z^{-1}(1-z)^\alpha\), \(\alpha\in(1,2)\).

My preferred research tools are Julia (with GenericLinearAlgebra.jl and GenericSchur.jl for high precision linear algebra and Pluto.jl for dynamic visualization and experiments), OEIS, RIES, Wolfram Alpha, Google Scholar, a MacBook Pro 13", an AMD Ryzen Threadripper 3970X (32 Core, 256GB RAM, GeForce RTX 2060), clusters at UPPMAX, and an iPad Pro 12.9" with Notability.

In my spare time I enjoy packrafting, collecting tools, art, books, and artifacts, and restoring my house Lilla Säteriet (built 1819) located in Ekeby by.

Contact by email for questions or collaboration.