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Manuscript Title: A subroutine and procedure for the rapid calculation of simple off-
diagonal rational approximants. | ||

Authors: P.R. Graves-Morris, D.E. Roberts | ||

Program title: FORTRAN CALCULATION OF SODS | ||

Catalogue identifier: ACRS_v1_0Distribution format: gz | ||

Journal reference: Comput. Phys. Commun. 9(1975)46 | ||

Programming language: Fortran. | ||

Computer: ICL 4130. | ||

Operating system: DES 2. | ||

RAM: 5K words | ||

Word size: 24 | ||

Keywords: General purpose, Rational, Approximant, Simple off diagonal, Prong, Chisholm, Perturbation series, Pade. | ||

Classification: 4.7. | ||

Nature of problem:These approximants may be applied for resummation of the perturbation series with two interaction hamiltonians, e.g. that in potential scattering given by the sum of an attractive and a repulsive Yukawa potential, many other applications are envisaged, especially in the field of critical phenomena. | ||

Solution method:Prong methods. | ||

Restrictions:The problem must be well-conditioned. Note that the programs are written for an ICL 4130 with 48 bits floating point word length. | ||

Running time:2N**4 m s approximately. |

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