We study dynamics in a neighborhood of a nonhyperbolic fixed point or an irreducible homoclinic tangent point. General type conditions for the existence of infinite sets of periodic points are obtained. A new method, based on the study of the dynamics of center disks, is introduced. (C) 2012 IMACS. Published by Elsevier B.V. All rights reserved.
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St Petersburg State Univ, Fac Math & Mech, St Petersburg 198504, RussiaSt Petersburg State Univ, Fac Math & Mech, St Petersburg 198504, Russia
Petrov, Alexey A.
Pilyugin, Sergei Yu.
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St Petersburg State Univ, Fac Math & Mech, St Petersburg 198504, Russia
St Petersburg State Electrotech Univ LETI, St Petersburg 197376, RussiaSt Petersburg State Univ, Fac Math & Mech, St Petersburg 198504, Russia