It is shown that, given a system of 2n first-order (or of n second-order) ODEs, there exists an infinite number of symplectic structures and Hamiltonian functions such that the corresponding Hamilton equations are locally equivalent to the given system of equations, without restrictions analogous to the Helmholtz conditions.
机构:
Univ Calif San Diego, Dept Math, 9500 Gilman Dr 0112, La Jolla, CA 92093 USAUniv Calif San Diego, Dept Math, 9500 Gilman Dr 0112, La Jolla, CA 92093 USA