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- W2002428472 abstract "For the particular case of an excitable FitzHugh–Nagumo system with diffusion, we investigate the transition from annihilation to crossing of the waves in the head-on collision. The analysis exploits the similarity between the local and the global phase portraits of the system. We find that the transition has features typical of the nucleation theory of first-order phase transitions, and may be understood through purely geometrical arguments. In the case of periodic boundary conditions, the transition is an infinite-dimensional analog of the creation and the vanishing of limit cycles via a homoclinic Andronov bifurcation. Both before and after the transition, the behavior of a single cell continues to be typical for excitable systems: a stable equilibrium state, and a threshold above which an excitation pulse can be induced. The generality and qualitative character of our argument shows that the phenomenon described can be observed in excitable systems well beyond the particular case presented here." @default.
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- W2002428472 date "2000-07-01" @default.
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- W2002428472 title "Head-on Collisions of Waves in an Excitable FitzHugh–Nagumo System: a Transition from Wave Annihilation to Classical Wave Behavior" @default.
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- W2002428472 doi "https://doi.org/10.1006/jtbi.2000.2044" @default.
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