|         |         | 
A pair  , where
, where  is a Manifold and
 is a Manifold and  is a Symplectic Form on
 is a Symplectic Form on  .  The 
Phase Space
.  The 
Phase Space 
 is a symplectic manifold.  Near every point on a symplectic
manifold, it is possible to find a set of local ``Darboux coordinates'' in which the Symplectic Form 
has the simple form
 is a symplectic manifold.  Near every point on a symplectic
manifold, it is possible to find a set of local ``Darboux coordinates'' in which the Symplectic Form 
has the simple form
 
 is a Wedge Product.
 is a Wedge Product.
See also Manifold, Symplectic Diffeomorphism, Symplectic Form
References
Sjamaar, R.  ``Symplectic Reduction and Riemann-Roch Formulas for Multiplicities.''  Bull. Amer. Math. Soc.
  33, 327-338, 1996.