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  Integral curve graphics 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  ;   for all curves. 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  .  Integral curves of Newton’s second law in the potentials   and  . Initial conditions   are on the unit circle (shown in gray) in the  ;   vanishes for all curves. 
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