R. Hagger

On the spectrum of the double-layer operator on locally-dilation-invariant Lipschitz domains

S. Chandler-Wilde, J. Virtanen, Karl-Mikael Perfekt, 2023, Numerische Mathematik.

Fredholm Theory with Applications to Random Operators

R. Hagger, Raffael Hagger, 2016 .

On the Spectrum and Numerical Range of Tridiagonal Random Operators

R. Hagger, 2014, 1407.5486.