Titlebook: Linear Turning Point Theory; Wolfgang Wasow Book 1985 Springer Science+Business Media New York 1985 Algebra.Calculation.Invariant.Variable

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A Singularly Perturbed Turning Point Problem,ins 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 . . a constant,for instance, which will be examined closely in the next section, becomes .under the simple change of variables

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978-1-4612-7008-9Springer Science+Business Media New York 1985

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Connection Problems,a [77], [78]; Iwano and Sibuya [29]; Iwano [26], [28]; Olver [62], [63], [65]; Nakano [49]; and Nishimoto [53]—[58]. In this account only differential equations of the form.with a turning point at x = 0 will be discussed. The known results for systems of higher order are less satisfying and more complicated.

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