Abstract
Differential equation problems that depend on small parameter ∈ in such a way that the order of the equation is lower for ∈ = 0 than for ∈≠ 0 but remains positive are now commonly called “singular perturbation problems.” The condition that the order remain positive for ∈ = 0 is not a very distinguishing property of the differential equation as such. The equation
k a constant, for instance, which will be examined closely in the next section, becomes
under the simple change of variables
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© 1985 Springer Science+Business Media New York
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Wasow, W. (1985). A Singularly Perturbed Turning Point Problem. In: Linear Turning Point Theory. Applied Mathematical Sciences, vol 54. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-1090-0_11
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DOI: https://doi.org/10.1007/978-1-4612-1090-0_11
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