Mathematics – Dynamical Systems
Scientific paper
2010-04-29
Mathematics
Dynamical Systems
141 pages num\'erot\'ees par paires de 1 \`a 71 (imprimer en format paysage) 21 figures dans 31 fichiers .eps, soumis
Scientific paper
We develop the theory of a new type of asymptotic expansions for functions of two variables the coefficients of which contain functions of one of the variables as well as functions of the quotient of these two variables. These combined asymptotic expansions (DAC) are particularly well suited for the description of solutions of singularly perturbed ordinary differential equations in the neighborhood of turning points. We describe the relations with the method of matched asymptotic expansions and with the classical composite asymptotic expansions used for boundary layers. We present a result of Ramis-Sibuya type that proves the existence of these DAC and provides Gevrey estimates. Three applications are given, two of which depend on Gevrey estimates for the DAC. In our article, we only apply the theory to scalar ordinary differential equations, but we are convinced that they will be very useful for systems of differential equations and other types of functional equations as well.
Fruchard Augustin
Schäfke Reinhard
No associations
LandOfFree
Développements asymptotiques combinés et points tournants d'équations différentielles singulièrement perturbées does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Développements asymptotiques combinés et points tournants d'équations différentielles singulièrement perturbées, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Développements asymptotiques combinés et points tournants d'équations différentielles singulièrement perturbées will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-284873