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arXiv 1909.07892math-phmath.DGmath.DSmath.MPmath.SG
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接触Hamilton系统中的无穷小对称性

Infinitesimal symmetries in Contact Hamiltonian systems

Manuel de León, Manuel Lainz Valcázar

摘要:

本文将拉格朗日系统的Noether定理推广到接触拉格朗日系统。我们引入了无穷小对称的分类,并得到了相应的耗散量。我们注意到,在接触动力学中,无穷小对称的存在并不产生守恒量,而是以与能量相同的速率耗散的函数;因此,相应的守恒量是真正的守恒量。

英文摘要:

In this paper, we extend the well-known Noether theorem for Lagrangian systems to contact Lagrangian systems. We introduce a classification of infinitesimal symmetries and obtain the corresponding dissipated quantities. We notice that in contact dynamics, the existence of infinitesimal symmetries does not produce conserved quantities, but functions that dissipate at the same rate than the energy; so, the corresponding quotients are true conserved quantities.

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