Hamiltonian Vector Field (Xh)
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Let F(r,p) be a function on the phase space.
dF/dt = (dF/dr)(dr/dt)+(dF/dp)(dP/dt)
d/dt = (dr/dt)d/dr + (dp/dt)d/dp
Rewriting with Hamilton's equations yields:
d/dt = (dH/dp)d/dr - (dH/dr)d/dp
This is the Hamiltonian vector field Xh. It is dependent on the Hamiltonian function.
(pg.67)
