Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] adkv_v2_0.tar.gz(12 Kbytes)|
|Manuscript Title: DTORH3 2.0: a new version of a computer program for the evaluation of toroidal harmonics.|
|Authors: A. Gil, J. Segura|
|Program title: DTORH3 v 2.0|
|Catalogue identifier: ADKV_v2_0|
Distribution format: tar.gz
|Journal reference: Comput. Phys. Commun. 139(2001)186|
|Programming language: Fortran.|
|Computer: Hewlett Packard 715/100, SUN Enterprise 3000, Pentium II 350MHz.|
|Operating system: UNIX, Linux.|
|Keywords: Toroidal harmonics, Legendre functions, Laplace's equation, Toroidal coordinates, General purpose.|
Nature of problem:
We include a new version of our code DTORH3 to evaluate toroidal harmonics. The algorithms find their application in problems with toroidal geometry (see refs. [1,2]).
The codes are based on the application of recurrence relations for Ps Qs both over m and n. The forward and backward recursions (over n or over m) are linked through continued fractions for the ratio of minimal solutions and Wronskian relations; the CF is replaced by series expansion and asymptotic expansion when it fails to converge.
Summary of revisions:
The maximum degree (order) that can be reached with our method, for a given order (degree) m(n) and for a fixed real positive value of x, is provided by the maximum real number defined in our machine. The user can choose two different relative accuracies (10^-8 or 10^-12) in the interval 1.0001 < x < 10000 for all available values of the orders and degrees. The range for x can be further extended by using quadruple precision for the input x and related variables (see LONG WRITE-UP).
Depends on the values of the argument x, the orders (m) and the degrees (n). For more details see text: LONG WRITE-UP, section 4.
|||Segura, J., Gil, A. Comput. Phys. Commun. 124 (2000) 104.|
|||Gil, A., Segura, J., Temme, N.M. J. Comp. Phys. 161 (81) (2000) 204.|
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