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Poisson bracket

   Also found in: Wikipedia 0.04 sec.
Poisson bracket [pwä′sōn‚brak·ət]
(mechanics)
For any two dynamical variables,XandY, the sum, over all degrees of freedom of the system, of (∂X/∂q)(∂Y/∂p)-(∂X/∂p)(∂Y/∂q), whereqis a generalized coordinate andpis the corresponding generalized momentum.


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