The Saddle-Node of Nearly Homogeneous Wave Trains in Reaction–Diffusion Systems
- 44 Downloads
We study the saddle-node bifurcation of a spatially homogeneous oscillation in a reaction-diffusion system posed on the real line. Beyond the stability of the primary homogeneous oscillations created in the bifurcation, we investigate existence and stability of wave trains with large wavelength that accompany the homogeneous oscillation. We find two different scenarios of possible bifurcation diagrams which we refer to as elliptic and hyperbolic. In both cases, we find all bifurcating wave trains and determine their stability on the unbounded real line. We confirm that the accompanying wave trains undergo a saddle-node bifurcation parallel to the saddle-node of the homogeneous oscillation, and we also show that the wave trains necessarily undergo sideband instabilities prior to the saddle-node.
KeywordsSaddle-node bifurcation wave trains homogeneous oscillation stability reaction diffusion systems
Unable to display preview. Download preview PDF.
- 4.Doelman, A., Sandstede, B., Scheel, A., and Schneider, G. (2006). The dynamics of modulated wave trains. To appear in Mem. AMS.Google Scholar
- 8.Rademacher, J. D. M., and Scheel, A. (2006). Instabilities of wave trains and turing patterns in large domains. To appear in Int. J. Bif. Chaos.Google Scholar