Výsledky vyhledávání - "Frederico, G. S. F."

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Noether-type theorem for fractional variational problems depending on fractional derivatives of functions

Autor: Lazo, M. J., Frederico, G. S. F., Carvalho-Neto, P. M.

In the present work, by taking advantage of a so-called practical limitation of fractional derivatives, namely, the absence of a simple chain and Leibniz's rules, we proposed a generalized fractional calculus of variation where the Lagrangian functio

Externí odkaz: http://arxiv.org/abs/1908.11414

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Noether theorem for action-dependent Lagrangian functions: conservation laws for non-conservative systems

Autor: Lazo, M. J., Paiva, J., Frederico, G. S. F.

In the present work, we formulate a generalization of the Noether Theorem for action-dependent Lagrangian functions. The Noether's theorem is one of the most important theorems for physics. It is well known that all conservation laws, \textrm{e.g.},

Externí odkaz: http://arxiv.org/abs/1906.06182

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Hight-order Noether's Theorem for Nonsmooth Extremals of Isoperimetric Variational Problems with Time Delay

Autor: Frederico, G. S. F., Lazo, M. J.

We obtain a nonsmooth higher-order extension of Noether's symmetry theorem for variational isoperimetric problems with delayed arguments. The result is proved to be valid in the class of Lipschitz functions, as long as the delayed higher-order Euler-

Externí odkaz: http://arxiv.org/abs/1603.06029

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Constants of motion for Isoperimetric Variational Problems with Time Delay

Autor: Frederico, G. S. F., Lazo, M. J., Barreto, M. N. F., Paiva, J.

In the present work, we obtain the constants of motion for isoperimetric variational problems with time delay. We consider a constrained optimization problem where the Lagrangian function defining the functional depends on time delayed arguments. We

Externí odkaz: http://arxiv.org/abs/1603.02335

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