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Fig. 9

Axisymmetric logarithmic potential: orbits with Lz = 1. (top to bottom): (x,u) Poincaré surface of section with E = 0.01 and .5. Computed orbits (dotted red circles) and analytical reconstructed tori (continuous dark lines) with an 18th order polynomial fitted along orbits with E = 0 to 0.5.
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