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math.FA2010★ 1 cited
Zeros of nonpositive type of generalized Nevanlinna functions with one negative square
H. S. V. de Snoo, H. Winkler, M. Wojtylak
A generalized Nevanlinna function with one negative square has precisely one generalized zero of nonpositive type in the closed extended upper halfplane. The fractional line…
math.FA2006
A canonical decomposition for linear operators and linear relations
S. Hassi, Z. Sebestyén, H. S. V. de Snoo +1
An arbitrary linear relation (multivalued operator) acting from one Hilbert space to another Hilbert space is shown to be the sum of a closable operator and a singular relation who…