q ˙ = ∂ p H q ˙ = { q , H } p ˙ = − ∂ q H p ˙ = { p , H } {\displaystyle {\begin{matrix}{\dot {q}}={{\partial }_{p}}H&{\dot {q}}=\left\{q,H\right\}\\{\dot {p}}=-{{\partial }_{q}}H&{\dot {p}}=\left\{p,H\right\}\\\end{matrix}}}
