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- W2034112224 abstract "In order to describe excitable reaction-diffusion systems, we derive a two-dimensional model with a Hopf and a semilocal saddle-node homoclinic bifurcation. This model gives the theoretical framework for the analysis of the saddle-node homoclinic bifurcation as observed in chemical experiments, and for the concepts of excitability and excitability threshold. We show that if diffusion drives an extended system across the excitability threshold then, depending on the initial conditions, wave trains, propagating solitary pulses and propagating pulse packets can exist in the same extended system. The extended model shows chemical turbulence for equal diffusion coefficients and presents all the known types of topologically distinct activity waves observed in chemical experiments. In particular, the approach presented here enables to design experiments in order to decide between excitable systems with sharp and finite width thresholds." @default.
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- W2034112224 date "2004-01-01" @default.
- W2034112224 modified "2023-10-18" @default.
- W2034112224 title "Excitability in a model with a saddle-node homoclinic bifurcation" @default.
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- W2034112224 doi "https://doi.org/10.3934/dcdsb.2004.4.419" @default.
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