Force field curves Integral curves of the differential equation with . Initial conditions are on the unit circle (shown in gray) in the . Integral curves of Newton’s second law with . Initial conditions are on the unit circle (shown in gray) in the ; for all curves. Newtonian vector field integral curves Integral curves of the Newtonian vector field of . Initial conditions are on the unit circle (shown in gray) in the . Force field curves of the real and imaginary parts of the function Integral curves of the differential equations and with . Initial conditions are on the unit circle (shown in gray) in the . vanishes for all curves. Integral curves of Newton’s second law in the potentials and . The black circle is the unit circle in the ,‐plane.
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