Routh Reduction by Stages

Autor: Bavo Langerock, Tom Mestdag, Joris Vankerschaver
Jazyk: angličtina
Rok vydání: 2011
Předmět:
Zdroj: Symmetry, Integrability and Geometry: Methods and Applications, Vol 7, p 109 (2011)
Druh dokumentu: article
ISSN: 1815-0659
DOI: 10.3842/SIGMA.2011.109
Popis: This paper deals with the Lagrangian analogue of symplectic or point reduction by stages. We develop Routh reduction as a reduction technique that preserves the Lagrangian nature of the dynamics. To do so we heavily rely on the relation between Routh reduction and cotangent symplectic reduction. The main results in this paper are: (i) we develop a class of so called magnetic Lagrangian systems and this class has the property that it is closed under Routh reduction; (ii) we construct a transformation relating the magnetic Lagrangian system obtained after two subsequent Routh reductions and the magnetic Lagrangian system obtained after Routh reduction w.r.t. to the full symmetry group.
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