Solution
= Solution
Hamilton's equations give $\dot H=H_q\cdot H_p-H_p\cdot H_q=0$. Also $\operatorname{div}V_H=\sum_a(\partial_{q_a}\partial_{p_a}H-\partial_{p_a}\partial_{q_a}H)=0$.
= Solution
Hamilton's equations give $\dot H=H_q\cdot H_p-H_p\cdot H_q=0$. Also $\operatorname{div}V_H=\sum_a(\partial_{q_a}\partial_{p_a}H-\partial_{p_a}\partial_{q_a}H)=0$.