Scale symmetry reduction applied to singular Lagrangians via De-Donder-Weyl formalism yields equivalent frictional dynamics for particles and fields, with applications to general relativity.
Singular lagrangians and precontact hamiltonian systems.Inter- national Journal of Geometric Methods in Modern Physics, 16(10):1950158, October 2019
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A review presents the geometry of pre-symplectic and pre-contact manifolds and develops constraint algorithms for admissible phase space in Hamiltonian systems with degeneracies.
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Gauge Symmetries, Contact Reduction, and Singular Field Theories
Scale symmetry reduction applied to singular Lagrangians via De-Donder-Weyl formalism yields equivalent frictional dynamics for particles and fields, with applications to general relativity.
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Constrained Symplectic and Contact Hamiltonian Systems: A Review
A review presents the geometry of pre-symplectic and pre-contact manifolds and develops constraint algorithms for admissible phase space in Hamiltonian systems with degeneracies.