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Unified Lagrangian-Hamiltonian formalism for contact systems

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arxiv 2003.13037 v2 pith:6KTHVCWS submitted 2020-03-29 math-ph math.MP

Unified Lagrangian-Hamiltonian formalism for contact systems

classification math-ph math.MP
keywords systemscontactframeworklagrangiansingularunifiedalgorithmapproach
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We present a unified geometric framework for describing both the Lagrangian and Hamiltonian formalisms of contact autonomous mechanical systems, which is based on the approach of the pionnering work of R. Skinner and R. Rusk. This framework permits to skip the second order differential equation problem, which is obtained as a part of the constraint algorithm (for singular or regular Lagrangians), and is specially useful to describe singular Lagrangian systems. Some examples are also discussed to illustrate the method.

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