The concept of generalized inversion of arbitrary complex matrices
Generalized inversion of arbitrary complex matrices
SEARCH · Engineering Papers
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.
Generalized inversion of arbitrary complex matrices
Triangular decomposition as aid in determining eigenvalues of large-order banded symmetric matrices
Methods for direct calculation of reduced density matrices in formulating atomic and molecular quantum mechanics
Perturbation theory for reduced density matrices
Closed product form and simplified algorithm for efficient operation of generalized Kronecker matrices, considering role in spectral analysis
Strong coupled rotational excitation problem in atom-diatomic molecule scattering system, discussing transition probability matrices statistical analysis
Realization theory of rational transfer matrices presented as fundamental algebraic objects in theory of finite, constant linear systems
Frequency domain analogies, polynomial matrices, and linear systems
Finite element program for determining stiffness and mass matrices of shells of revolution - users manual
Sparse matrices inverses and eigenvectors computation methods, giving bibliography
Symmetric sparse matrices transformation to triple diagonal form, giving algorithms for nonzero elements growth minimization
Perturbation theory for reduced density matrices representable as functions of independent parameters
First and second order density matrices calculation of pure state N fermion systems, using higher random phase approximation
Function classes of n-dimensional nonlinear mappings generalizing matrices, including convergence for Jacobi and Gauss-Seidel process
Extreme eigenvalues of Toeplitz matrices associated with Laguerre and Jacobi polynomials, using finite difference operators
Computer program was developed to reduce both mass and stiffness matrices by eliminating degrees of freedom using Cholesky decomposition. Program is written in FORTRAN G or H for IBM 360 computer.
The connection between the Van Kampen and Landau representations of the Vlasov equations has been extended to Fourier-Hermite expansions containing more than 1000 terms by taking advantage of the properties of tridiagonal matrices. These numerical results are regarded as conclusive indications of the nonuniformly convergent behavior of the approximation curve in the limit of an infinite number of terms and represent an extension of work begun by Grant (1967) and by Grant and Feix (1967).
Reexamination power series solutions to the matrix covariance differential equation and the transition differential equation. Truncation error bounds are derived which are computationally attractive and which extend previous results. Polynomial approximations are obtained by exploiting the functional equations satisfied by the transition and covariance matrices. The series-functional equation propagation technique represents a fast and accurate alternative to the numerical integration of the time-invariant transition and covariance equations.