TITLE:
Renormalized Coordinate Stretching: A Generalization of Shoot and Fit with Application to Stellar Structure
AUTHORS:
Peter D. Usher
KEYWORDS:
Singular Non-Linear Boundary Value Problems; Renormalized Coordinate Stretching; Poincaré-Lighthill Perturbation Theory; Numerical Analysis; Stellar Structure
JOURNAL NAME:
International Journal of Astronomy and Astrophysics,
Vol.3 No.3,
September
3,
2013
ABSTRACT: The standard shooting and fitting algorithm for
non-linear two-point boundary value problems derives from conventional
coordinate perturbation theory. We generalize the algorithm using the
renormalized perturbation theory of strained coordinates. This allows for the
introduction of an arbitrary function, which may be chosen to improve numerical
convergence. An application to a problem in stellar structure exemplifies the
algorithm and shows that, when used in conjunction with the standard procedure,
it has superior convergence compared to the standard one alone.