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Dr. Christian Wyss

University of Wuppertal
School of Mathematics and Natural Sciences
Arbeitsgruppe Funktionalanalysis

Gaußstraße 20
D-42119 Wuppertal


Office: G.15.03
Phone: +49(0)202 439 2520
E-Mail: wyss{at}

Research interests

Functional analysis
Operator theory
Indefinite inner products
Mathematical systems theory


  • Perturbation theory, spectrum
  • Expansion in eigenvectors, invariant subspaces, Riesz bases
  • Riccati equations, Hamiltonian matrices