A symbolic-numerical method to integrate ODEs at a singular point

• Published in: Applied mathematics letters Vol. 12; no. 6; pp. 97 - 101
• Main Authors: Farto, J.M., González, A.B., Martín, P.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.1999
• ISSN: 0893-9659; 1873-5452
• DOI: 10.1016/S0893-9659(99)00085-3

Classical numerical codes are not valid for the integration of singular initial value problems. However, these problems are very common in the applied sciences. An example is the study of the elastic equations of the earth including the effect of the solid inner core. Frequently, the technique used is the introduction of a change of variable (mainly blowing-up) that remove the singularity or reduce the singularity to an other more simple. In this paper, we propose the combination of a symbolic technique, which let us obtain parameterizations of the solutions in the singular point, with a classical numerical code that we initialize with the symbolic solution. There are a lot of extensions of these techniques. Here we only present a first approach to the problem.