The method of variational matrix Pade approximants is seen to unify the Green's function method and the variational principle for calculating scattering amplitudes. The surprising result that exact answers can be obtained for square well potentials is thereby proved, and the remarkable accuracy of t
Subroutine for calculation of matrix padé approximants
✍ Scribed by Yair Starkand
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 475 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0010-4655
No coin nor oath required. For personal study only.
✦ Synopsis
ber of coefficients in the perturbation expansion of a matrixvalued function of any given dimension, the program com-
📜 SIMILAR VOLUMES
## An extrapolation method based on Yad6approsimants of type II is suggested for general iterative sequences.. Preliminary numerical !es~r indicate illat when the proposed method is applied to Hortree-Fock SCF iterarkc se-qz~nces. a considerable reduction CT the number of iterarions is expected.
Operating systenv DES 2 Nature of physical problem These approximants may be applied for resummation of the Programminglanguage used: ALGOL 60 perturbation series with two interaction hamiltonians, e.g., High speed storage required: 5000 words that in potential scattering given by the sum of an attr
A comparison is made between Pade and Pade -type approximants. Let Q n be the n th orthonormal polynomial with respect to a positive measure + with compact support in C. We show that for functions of the form where w is an analytic function on the support of +, Pade -type approximants with denomina