Prof. Dr. Henk de Snoo

Honorary Professor

  • room number: 478 (Bernoulliborg, building 5161)
  • phone numbers
      domestic:    (050) 363 3963
international:    +31 50 363 3963
  • e-mail: H.S.V.de.Snoo rug.nl


  • Abstract boundary-value problems
  • Semibounded and sectorial relations and forms, and their decompositions
  • Structure of linear relations
  • Classification of (generalized) Nevanlinna functions; asymptotic expansions
  • Singular perturbations of selfadjoint operators
  • Canonical systems of differential equations; Sturm-Liouville equations (with floating singularities)
  • System-theoretic realizations of classes of Nevanlinna functions and Nevanlinna families

Henk's recent publications

S. Hassi, H.S.V. de Snoo, and H. Winkler. Limit properties of eigenvalues in spectral gaps. Operator Theory: Adv. Appl., 263:335–355, 2018.   bib
H.S.V. de Snoo and H. Woracek. Compressed resolvents, Q-functions and h_0-resolvents in almost Pontryagin spaces. Operator Theory: Adv. Appl., 263:425–483, 2018.   bib
Henk de Snoo and Harald Woracek. The Krein formula in almost Pontryagin spaces. A proof via orthogonal coupling. Indagationes Mathematicae, 29(2):714 – 729, 2018.   url
Seppo Hassi, Manfred Möller, and Henk de Snoo. Limit-point/limit-circle classification for Hain–Lüst type equations. Mathematische Nachrichten, 2017.   doi
S. Hassi, A. Sandovici, H.S.V. de Snoo, and H. Winkler. Extremal maximal sectorial extensions of sectorial relations. Indagationes Mathematicae, 28(5):1019 – 1055, 2017.   url

(For more details go to Henk's personal home page.)