open bin:strange attractors:birkhoff bagel:bagel.traj
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open bin:strange attractors:birkhoff bagel:bagel.strobe
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Birkhoff Bagel
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• Without forcing this system has a stable limit cycle (with a frequency of about 0.45).
• Any forcing introduces the new frequency (namely 2) making it quasi-periodic and the trajectories lie on a torus, but only if the forcing is not large. e.g. F=0.35