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Stability Theory

In: Differential Equations: Theory and Applications

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  • David Betounes

    (Valdosta State University, Department of Physics, Astronomy and Geosciences)

Abstract

In this chapter we study the topic of stability for dynamical systems. There are number of different concepts and definitions of stability and these apply to various types of integral curves: fixed points, periodic solutions, etc., for dynamical systems (cf. [Ha 82], [Rob 95], [RM 80], [AM 78], [Co 65], [Bel 53], [Mer 97]). This chapter provides an introduction to the subject, giving first a few results about stability of fixed points and then a brief discussion of stability of periodic solutions (also called cycles or closed integral curves). The question of whether a given motion of a dynamical system is stable or not is a natural one, and we have already used the terminology–stable/unstable fixed point–throughout the text in numerous examples. The definitions of stability are given precisely below, but the basic idea in these definitions is whether the integral curves starting near a given fixed point (or more generally near a given integral curve) will stay near it (stability), and perhaps tend toward it asymptotically in time (asymptotic stability).

Suggested Citation

  • David Betounes, 2010. "Stability Theory," Springer Books, in: Differential Equations: Theory and Applications, chapter 0, pages 267-332, Springer.
    • Handle: RePEc:spr:sprchp:978-1-4419-1163-6_6
    DOI: 10.1007/978-1-4419-1163-6_6
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