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- W2743506039 abstract "This paper focuses on studying the Noether symmetry and the conserved quantity with non-standard Lagrangians, namely exponential Lagrangians and power-law Lagrangians on time scales. Firstly, for each case, the Hamilton principle based on the action with non-standard Lagrangians on time scales is established, with which the corresponding Euler–Lagrange equation is given. Secondly, according to the invariance of the Hamilton action under the infinitesimal transformation, the Noether theorem for the dynamical system with non-standard Lagrangians on time scales is established. The proof of the theorem consists of two steps. First, it is proved under the infinitesimal transformations of a special one-parameter group without transforming time. Second, utilizing the technique of time-re-parameterization, the Noether theorem in a general form is obtained. The Noether-type conserved quantities with non-standard Lagrangians in both classical and discrete cases are given. Finally, an example in Friedmann–Robertson–Walker spacetime and an example about second order Duffing equation are given to illustrate the application of the results." @default.
- W2743506039 created "2017-08-17" @default.
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- W2743506039 date "2017-08-01" @default.
- W2743506039 modified "2023-09-25" @default.
- W2743506039 title "Noether symmetry and conserved quantity for dynamical system with non-standard Lagrangians on time scales" @default.
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- W2743506039 doi "https://doi.org/10.1088/1674-1056/26/8/084501" @default.
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