Authors: HASSI S DESNOO H

Citation: S. Hassi et H. Desnoo, NEVANLINNA FUNCTIONS, PERTURBATION FORMULAS, AND TRIPLETS OF HILBERT-SPACES, Mathematische Nachrichten, 195, 1998, pp. 115-138

Authors: HASSI S DESNOO HSV WILLEMSMA ADI

Citation: S. Hassi et al., SMOOTH RANK-ONE PERTURBATIONS OF SELF-ADJOINT OPERATORS, Proceedings of the American Mathematical Society, 126(9), 1998, pp. 2663-2675

Authors: HASSI S DESNOO H

Citation: S. Hassi et H. Desnoo, ON RANK-ONE PERTURBATIONS OF SELF-ADJOINT OPERATORS, Integral equations and operator theory, 29(3), 1997, pp. 288-300

Authors: HASSI S KALTENBACK M DESNOO H

Citation: S. Hassi et al., A CHARACTERIZATION OF SEMIBOUNDED SELF-ADJOINT OPERATORS, Proceedings of the American Mathematical Society, 125(9), 1997, pp. 2681-2692

Authors: HASSI S NORDSTROM K

Citation: S. Hassi et K. Nordstrom, ON PROJECTIONS IN A SPACE WITH AN INDEFINITE METRIC, Linear algebra and its applications, 209, 1994, pp. 401-417