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Date: 1-12-2021
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Date: 22-9-2021
1854
Date: 30-8-2021
1637
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States that for a nondissipative Hamiltonian system, phase space density (the area between phase space contours) is constant. This requires that, given a small time increment ,
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the Jacobian be equal to one:
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Expressed in another form, the integral of the Liouville measure,
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is a constant of motion. Symplectic maps of Hamiltonian systems must therefore be area preserving (and have determinants equal to 1).
REFERENCES:
Chavel, I. Riemannian Geometry: A Modern Introduction. New York: Cambridge University Press, 1994.
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