Geodesic
Perturbation theory for particle in one-dimensional, central- or axial-symmetric fields
Teoretičeskaâ i matematičeskaâ fizika, Tome 112 (1997) no. 1, pp. 119-123 Cet article a éte moissonné depuis la source Math-Net.Ru

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Perturbation theory for which all corrections to a nonperturbed state are defined by its wave function is obtained. A new applicability condition for this theory is formulated. By considering a simple example comparison with the Rayleigh–Schrödinger perturbation theory giving an analytical expression for the corresponding series is performed. 
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     title = {Perturbation theory for particle in one-dimensional, central- or axial-symmetric fields},
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Yu. I. Polyakov. Perturbation theory for particle in one-dimensional, central- or axial-symmetric fields. Teoretičeskaâ i matematičeskaâ fizika, Tome 112 (1997) no. 1, pp. 119-123. http://geodesic.mathdoc.fr/item/TMF_1997_112_1_a7/

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