Global dynamics of a differential equation with piecewise constant argument

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Several aspects of global dynamics are studied for the scalar differential-difference equation ε over(x, ̇) (t) + x (t) = f (x ([t])), 0 < ε ≪ 1, where [{dot operator}] is the integer part function. The equation is a particular case of the special discretization (discrete version) of the singularly perturbed differential delay equation ε over(x, ̇) (t) + x (t) = f (x (t - 1)). Sufficient conditions for the invariance, global stability of equilibria, existence, stability/instability, and shape of periodic solutions, and the chaotic behavior are derived. The principal analysis is based on the reduction of its dynamics to the one-dimensional map F : x → f (x) + [x - f (x)] e- 1 / ε, many relevant properties of which follow from those of the interval map f.

Original languageEnglish (US)
Pages (from-to)e2384-e2389
JournalNonlinear Analysis, Theory, Methods and Applications
Issue number12
StatePublished - Dec 15 2009

All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics


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