Abstract
Fundamental analytic, algebraic, and geometric properties of generalized Hamiltonian (Birkhoffian) theory are compared with the properties of a covering unitary phase-space formulation based on complex variables of the form (p+iq). Technical advantages in the unitary phase-space formulation are illustrated by a detailed discussion of the one-dimensional extended damped harmonic oscillator. One advantage is the ability to fully describe nonconservative constraint forces within a globally conservative system. Another advantage is that wider classes of gauge transformations are available to simplify the construction of smooth solution manifolds.
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McEwan, J. A complex formulation of generalized Hamiltonian (Birkhoffian) theory. Found Phys 23, 313–327 (1993). https://doi.org/10.1007/BF01883632
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DOI: https://doi.org/10.1007/BF01883632