Skip to main content

Research Repository

Advanced Search

Shape of transition layers in a differential--delay equation

Wattis, Jonathan A.D.

Authors



Abstract

We use asymptotic techniques to describe the bifurcation from steady-state to a periodic solution in the singularly perturbed delayed logistic equation εx˙(t) = −x(t)+ λ f(x(t − 1)) with ε ≪ 1. The solution has the form of plateaus of approximately unit width separated by narrow transition layers. The calculation of the period two solution is complicated by the presence of delay terms in the equation for the transition layers, which induces a phase shift that has to be calculated as part of the solution. High order asymptotic calculations enable both the shift and the shape of the layers to be determined analytically, and hence the period of the solution. We show numerically that the form of transition layers in the four-cycles is similar to that of the two-cycle, but that a three-cycle exhibits different behaviour.

Journal Article Type Article
Journal IMA Journal of Applied Mathematics
Print ISSN 0272-4960
Electronic ISSN 1464-3634
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
APA6 Citation Wattis, J. A. (in press). Shape of transition layers in a differential--delay equation. IMA Journal of Applied Mathematics, https://doi.org/10.1093/imamat/hxx011
DOI https://doi.org/10.1093/imamat/hxx011
Keywords Asymptotic analysis, differential--delay equation,
transition layers
Publisher URL https://academic.oup.com/imamat/article-lookup/doi/10.1093/imamat/hxx011
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This is a pre-copyedited, author-produced version of an article accepted for publication in IMA Journal of Applied Mathematics following peer review. The version of record Jonathan A. D. Wattis; Shape of transition layers in a differential-delay equation. IMA J Appl Math 2017 hxx011. doi: 10.1093/imamat/hxx011 is available online at: https://academic.oup.co...i/10.1093/imamat/hxx011

Files

LP15open.pdf (826 Kb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





You might also like



Downloadable Citations

;