Abstract
In this paper we study the discretization effects on the Takens–Bogdanov bifurcation of delay differential equations by forward Euler scheme. We show that the Takens–Bogdanov point is inherited by the discretization without any shift and turns into a 1:1 resonance point. The normal form on the center manifold near this singular point of the forward Euler method is calculated by applying a new technique, which is developed in this work for a general class of parameterized maps. The local dynamical behaviors are investigated in detail through this normal form. We show that the bifurcated Hopf point branch and the homoclinic branch of the numerical method are \(O(h)\) close to their continuous counterparts, where \(h\) is stepsize. A numerical experiment is presented to illustrate the theoretical results.
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Acknowledgments
The authors thank the anonymous referees for their valuable comments and suggestions which have greatly improved the presentation. Supported by NSFC Grants Nos. 11201061, 11271065, 11371171, 11271157, China Postdoctoral Science Foundation 2012M520657 and NSF of Jilin Province 20140520058JH.
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Xu, Y., Zou, Y. Preservation of Takens–Bogdanov Bifurcations for Delay Differential Equations by Euler Discretization. J Dyn Diff Equat 26, 1029–1048 (2014). https://doi.org/10.1007/s10884-014-9354-5
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DOI: https://doi.org/10.1007/s10884-014-9354-5