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Transactions of the American Mathematical Society

Published by the American Mathematical Society since 1900, Transactions of the American Mathematical Society is devoted to longer research articles in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

The 2020 MCQ for Transactions of the American Mathematical Society is 1.48.

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Semidirect products and reduction in mechanics
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by Jerrold E. Marsden, Tudor Raţiu and Alan Weinstein PDF
Trans. Amer. Math. Soc. 281 (1984), 147-177 Request permission

Abstract:

This paper shows how to reduce a Hamiltonian system on the cotangent bundle of a Lie group to a Hamiltonian system in the dual of the Lie algebra of a semidirect product. The procedure simplifies, unifies, and extends work of Greene, Guillemin, Holm, Holmes, Kupershmidt, Marsden, Morrison, Ratiu, Sternberg and others. The heavy top, compressible fluids, magnetohydrodynamics, elasticity, the Maxwell-Vlasov equations and multifluid plasmas are presented as examples. Starting with Lagrangian variables, our method explains in a direct way why semidirect products occur so frequently in examples. It also provides a framework for the systematic introduction of Clebsch, or canonical, variables.
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Additional Information
  • © Copyright 1984 American Mathematical Society
  • Journal: Trans. Amer. Math. Soc. 281 (1984), 147-177
  • MSC: Primary 58F05; Secondary 58G40, 70E15, 73C99, 76N99, 76W05, 78A99
  • DOI: https://doi.org/10.1090/S0002-9947-1984-0719663-1
  • MathSciNet review: 719663