Journal
JOURNAL OF STATISTICAL PHYSICS
Volume 101, Issue 1-2, Pages 521-541Publisher
KLUWER ACADEMIC/PLENUM PUBL
DOI: 10.1023/A:1026415607690
Keywords
spatially homogenous solution; codimension one bifurcations; spatial unfolding; phase and period-doubling instabilities; parity symmetry; amplitude equation
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We consider solutions of a partial differential equation which are homogeneous in space and stationary or periodic in time. We study the stability with respect to large wavelength perturbations and the weakly nonlinear behavior around these solutions, especially when they are close to bifurcations for the ordinary differential equation governing the homogeneous solutions of the PDE. We distinguish cases where a spatial parity symmetry holds. All bifurcations occurring generically for two-dimensional ODES are treated. Our main result is that for almost homoclinic periodic solutions instability is generic.
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