作者: D. J. Ernst , C. M. Shakin , R. M. Thaler
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摘要: Consideration is given to the approximation in which an arbitrary potential replaced by a separable potential. A method presented permits construction of rank-$N$ has property that resulting $T$ matrix exact on energy shell and half off at $N$ selected bound state and/or continuum energies. This yields correct vicinity on-shell points.