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Structure of a PoincarĂ© map in the neighborhood of a separatrix cycle of a perturbed analytic autonomous system in the plane. (English. Russian original) Zbl 0503.34019
Differ. Equations 17, 321-328 (1981); translation from Differ. Uravn. 17, 469-478 (1981).

MSC:
34C05 Topological structure of integral curves, singular points, limit cycles of ordinary differential equations
34D10 Perturbations of ordinary differential equations
34C99 Qualitative theory for ordinary differential equations
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