This is an unevaluated Mathematica
notebook. If you do not have a copy of Mathematica handy, you may want to
also view the evaluated version.
This package contains tools for perturbation expansions of the solutions of
ordinary differential equations. It provides functions for straightforward
expansions, expansions with strained coordinates, and matched asymptotic
The package is an enhancement of SKPackages`Perturbation`. The output forms
of several functions have been redesigned to resemble the results of DSolve.
Some parameters have also been changed. Expansions with respect to any list of
gauge functions and straightforward expansions of ODE-systems are possible now.