docs:utils:poincare
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docs:utils:poincare [2009/02/23 12:56] gibson |
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| ====== poincare ====== | ====== poincare ====== | ||
| - | compute crossings of a Poincare section in a pre-computed trajectory | + | Compute crossings of a Poincare section in a pre-computed trajectory. The Poincare condition is %%(u(t) - ueqb, e) == 0%%, i.e. the displacement from a given point %%ueqb%% is orthogonal to a direction %%e%%. The program checks for changes in sign in the inner product in the stored trajectory (with large %%dT%%, and when it finds one, goes back and reintegrates with small %%dt%%, and then does quadratic interpolation when the fine-scale trajectory recrosses the section. |
| ===== usage ===== | ===== usage ===== | ||
docs/utils/poincare.txt · Last modified: 2010/02/02 07:55 (external edit)
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