Normal Forms for an Age Structured Model

Jixun Chu, Zhihua Liu, Pierre Magal, Shigui Ruan

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


In this paper, we apply the recently developed normal form theory for abstract Cauchy problems with non-dense domain in Liu et al. (J Diff Equ 257:921–1011, 2014) to study normal forms for an age structured model. We provide detailed computations for the Taylor’s expansion of the reduced system on the center manifold, from which explicit formulae are given to determine the direction of the Hopf bifurcation and the stability and amplitude of the bifurcating periodic solutions.

Original languageEnglish (US)
Pages (from-to)733-761
Number of pages29
JournalJournal of Dynamics and Differential Equations
Issue number3-4
StatePublished - Sep 1 2016


  • Age structured model
  • Hopf bifurcation
  • Non-densely defined Cauchy problem
  • Normal form
  • Periodic solution

ASJC Scopus subject areas

  • Analysis


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