Computing in Science and Engineering: Volume 3 Issue 1, January 1, 2001
Publisher: IEEE Educational Activities Department
This article describes ISNAP, a program for calculating atomic properties that uses an integrated symbolic and numerical approach for arbitrary excitations from closed-shell atoms. This program generates transition matrix elements and energy formulas up to third-order perturbation via the symbolic programming language Mathematica.
ACM Transactions on Mathematical Software (TOMS): Volume 18 Issue 3, Sept. 1992
Citation Count: 4
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A numerical evaluator for the confluent hypergeometric function for complex arguments with large magnitudes using a direct summation of Kummer's series is presented. Extended precision subroutines using large arrays to accumulate a single numerator and denominator are ultimately used in a single division to arrive at the final result. The ...
evaluator, confluent hypergeometric, special functions
Journal of Computational and Applied Mathematics: Volume 39 Issue 2, March 30, 1992
Publisher: Elsevier Science Publishers B. V.
Coulomb functions, numerical evaluation, performance evaluation, Bessel functions, Hankel functions, confluent hypergeometric function