 |
where 
and 
are momenta and positions of particles.
Liouville Measure
See also
Liouville's Phase Space Theorem, Phase SpaceExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Liouville Measure." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LiouvilleMeasure.html