Abstract
Invited lecture at Konferensi Nasional Matematika XIII, Semarang, 24-27 juli, 2006; to be publ. in J.
Indones. Math. Soc. (2007)
After reviewing a number of results from geometric singular perturbation theory, we
discuss several approaches to obtain periodic solutions in a slow manifold. Regarding
nonhyperbolic transitions we consider relaxation oscillations and canard-like solutions.
The results
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