TY  - BOOK
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
ED  - Demuth, Michael
ED  - Exner, Pavel
T1  - Mathematical results in quantum mechanics : international conference in Blossin (Germany), May 17 - 21, 1993
T3  - Operator Theory
Y1  - 1994
VL  - 70
PB  - Birkhäuser
CY  - Basel
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - Singular perturbations, regularization and extension theory
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - Towards the right Hamiltonians for singular perturbations via regularization and extension theory
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - On the right Hamiltonian for the singular perturbations : general theory
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - Fractional powers of self-adjoint operators and Trotter-Kato product formula
Y1  - 1997
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - On operator-norm convergence of the Trotter-Kato product formula
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - Does each symmetric operator have a stability domain?
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - On error estimates for Trotter-Product formulas.
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - On semibounded restrictions of selfadjoint operators
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - Trotter-Kato product formula and symmetrically-normed ideals
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Neidhardt, Hagen
A1  - Zagrebnov, Valentin A.
T1  - Trotter-Kato product formula and operator-norm convergence
Y1  - 1999
ER  -