4.4 Driven Pendulum: Divergence
•So how accurate is a computed trajectory?
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•A computer solves an equation by taking short steps in time, and estimating where the system will move in each step
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•Put bluntly, it makes a small error at each step
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•Unfortunately chaos magnifies small errors
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•So a computed trajectory is basically unreliable
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•We hope that, like our pendulums, the trajectory may be wrong, but the attractor may be right
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•Issues like this are still a research topic             @