Abstract
Singular perturbation problems not amenable to solution by asymptotic methods require special treatment, such as the method of Carrier and Pearson. Rather than devising special methods for these problems, this paper suggests that there may be a uniform way to solve singular perturbation problems, which may or may not succumb to asymptotic methods. A potential mechanism for doing this is the author's boundary-value technique, a nonasymptotic method, which previously has only been applied to singular perturbation problems that lend themselves to asymptotic techniques. Two problems, claimed by Carrier and Pearson to be insoluble by asymptotic methods, are solved by the boundary-value method.
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References
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Roberts, S.M. An approach to singular perturbation problems insoluble by asymptotic methods. J Optim Theory Appl 48, 325–339 (1986). https://doi.org/10.1007/BF00940677
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DOI: https://doi.org/10.1007/BF00940677