2. For $w(t)$ taking values in $C$, define a new curve by $z(s) = w(t)^2$, $\frac{ds}{dt} = |w(t)|^2$. Show that if $w''(t) = -w(t)$, then $z''(s) = -4E \frac{z(s)}{|z(s)|^3}$, so $z(s)$ solves the Kepler problem.
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This means that w and t have opposite signs. If we substitute -wt for wt in the equations above, we get: s = (-wt)^2 - 91 s = w^2t^2 - 91 s = (-wt)^12 s = w^12t^12 Now, let's simplify these equations: s = w^2t^2 - 91 s = w^12t^12 Show more…
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