Padé approximants and symmetry-adapted perturbation theories
✍ Scribed by A.T. Amos; J.A. Yoffe
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 420 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0009-2614
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📜 SIMILAR VOLUMES
Psdd approximnnts are applied to improve the convergence of various perturbation expansrons for the enemy of n groundstate hydrogen atom intemcting with ;t proton. It is observed that the convergence defects of the Rayleigh-Schrodiager (RS) polarization and g mmetrized RS polarization expansions nre
The aim of this paper is to define vector Pade -type approximants and vector Pade approximants following the same ideas as in the scalar case. This approach will be possible using Clifford's algebra structures. Vector Pade approximants will be derived from the theory of formal vector orthogonal poly
A formulation of double perturbation theory is described which allows symmetry to be included in those cases where the z,ereorder hamiltonian does not contiin the full symmetry of the problem. As an example-we apply the fl~cov to the Epstein-Johnson spin model. 1 .-Introduction 2. Theory Some years