Phase-plane area formula for an action variable
= Phase-plane area formula for an action variable
The action $(2\pi)^{-1}\oint p\,dq$ is the area enclosed by a periodic phase-plane orbit divided by $2\pi$.
= Phase-plane area formula for an action variable
The action $(2\pi)^{-1}\oint p\,dq$ is the area enclosed by a periodic phase-plane orbit divided by $2\pi$.