Geodesic
Boundary layers in the solution of singularly perturbed boundary value problem with a degenerate equation having roots of multiplicity two
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 51 (2011) no. 3, pp. 379-383 Cet article a éte moissonné depuis la source Math-Net.Ru

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The occurrence of exponential boundary layers in a second-order ordinary differential equation due to the fact that the degenerate equation has a root of multiplicity two is briefly reviewed. 
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A. B. Vasil'eva. Boundary layers in the solution of singularly perturbed boundary value problem with a degenerate equation having roots of multiplicity two. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 51 (2011) no. 3, pp. 379-383. http://geodesic.mathdoc.fr/item/ZVMMF_2011_51_3_a0/

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