Perturbed Operators in Hilbert Space
Perturbed operators in Hilbert space in justification of Rayleigh-Schroedinger perturbation theory in quantum chemistry
OPERATOR↗
SEARCH · Search NASA
Results for “Hilbert space”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Applications of reproducing kernel Hilbert spaces - Bandlimited signal models.
Abstract reproducing kernel Hilbert spaces /RKHS/, applying basic properties to band limited signals study
Yao, K.↗
A Newton-gradient Method for Non-linear Problems in Hilbert Space Technical Report No. 7
Newton-gradient method for non-linear problems in Hilbert space
NEWTON THEORY↗
Pseudoinversion for operator's defined on finite dimensional Hilbert spaces
Algorithm for computing pseudoinverse for any linear operator on Hilbert spaces
Engvall, J. L.↗
An invariance principle for dynamical systems in Hilbert spaces
Invariance method for extending Liapunov function to distributed parameter system
Infante, E. F.↗
The operator theory of the pseudo-inverse. i - bounded operators.
Operator theory of pseudo-inverse generalized to encompass linear bounded operators on Hilbert spaces
HILBERT SPACE↗
Linear and antilinear transformations.
Linear and antilinear transformations for real and complex Hilbert space
HILBERT SPACE↗
Differential operators and their adjoints under integral and multiple point boundary conditions
Differential operators and adjoint systems derived from Green function and Hilbert spaces
GREEN FUNCTION↗
The operator theory of the pseudo-inverse. II - Unbounded operators with arbitrary range.
Pseudo-inverse concept extended to Hilbert space unbounded operators with arbitrary range
HILBERT SPACE↗
Lower-bound procedure for energy eigenvalues by the partitioning technique.
Lower bound procedure in quantum mechanical energy equation eigenvalue problem by partitioning and bracketing Hilbert space
PARTITION FUNCTION↗
Remarks on the infinite dimensional Riccati equation.
Existence and uniqueness theorem of Riccati equation arising in solution of optimal linear regulator problems in Hilbert space
UNIQUENESS THEOREM↗
The operator theory of the pseudo-inverse. ii - unbounded operators with arbitrary range.
Extension of pseudo-inverse operator theory to Hilbert space operators that are unbounded and have arbitrary range
OPERATIONAL CALCULUS↗
The equivalence of elementary and composite particles.
Equivalence of elementary and composite particles established by generalized Weinberg formalism for addition of discrete eigenstates of free-particle Hamiltonian to Hilbert space of system
PARTICLE THEORY↗
Studies in Perturbation Theory. XI. Lower Bounds to Energy Eigenvalues, Ground State, and Excited States
The bracketing theorem in the partitioning technique for solving the Schrödinger equation may be used in principle to determine upper and lower bounds to energy eigenvalues. Practical lower bounds of any accuracy desired may be evaluated by utilizing the properties of ``inner projections'' on finite manifolds in the Hilbert space. The method is here applied to the ground state and excited states of a Hamiltonian H=H(sub 0)+V having a positive definite perturbation V. Even if inspiration is derived from the method of intermediate Hamiltonians, the final results are of bracketing type and independent of this approach. The method is numerically illustrated in some accompanying papers.
Loewdin, Per-Olov↗
Coupled-channels method for rearrangement collisions
Classification and construction of open-channel projection operators for rearrangement collisions using subspaces of total Hilbert space of system
Volkin, H. C.↗
Stationary and Related Stochastic Processes- Sample Function Properties and their Applications.
Book on stationary and related stochastic processes covering sample function properties and applications, Hilbert space geometry, etc
Cramer, H.↗
Semi-groups, groups and Lyapunov stability of partial differential equations.
Semigroups, groups and Liapunov stability of partial differential equation, obtaining operator differential equations in Hilbert spaces
Buis, G. R.↗
Differential operators and their adjoints under integral and multiple point boundary conditions.
Differential operators and adjoints defined on Hilbert space of n x 1 matrices under integral and multiple point boundary conditions
Krall, A. M.↗