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We prove a necessary optimality condition of Euler-Lagrange type for variational problems on time scales involving nabla derivatives of higher-order. The proof is done using a new and more general fundamental lemma of the calculus of…

Optimization and Control · Mathematics 2009-11-13 Natalia Martins , Delfim F. M. Torres

We prove the Euler-Lagrange delta-differential equations for problems of the calculus of variations on arbitrary time scales with delta-integral functionals depending on higher-order delta derivatives.

Optimization and Control · Mathematics 2010-10-05 Rui A. C. Ferreira , Agnieszka B. Malinowska , Delfim F. M. Torres

We study more general variational problems on time scales. Previous results are generalized by proving necessary optimality conditions for (i) variational problems involving delta derivatives of more than the first order, and (ii) problems…

Optimization and Control · Mathematics 2007-05-23 Rui A. C. Ferreira , Delfim F. M. Torres

We prove a version of the Euler-Lagrange equations for certain problems of the calculus of variations on time scales with higher-order delta derivatives.

Optimization and Control · Mathematics 2009-08-13 Rui A. C. Ferreira , Delfim F. M. Torres

We study problems of the calculus of variations and optimal control within the framework of time scales. Specifically, we obtain Euler-Lagrange type equations for both Lagrangians depending on higher order delta derivatives and…

Optimization and Control · Mathematics 2010-07-30 Rui A. C. Ferreira

We prove necessary optimality conditions of Euler-Lagrange type for generalized problems of the calculus of variations on time scales with a Lagrangian depending not only on the independent variable, an unknown function and its delta…

Optimization and Control · Mathematics 2011-05-02 Natalia Martins , Delfim F. M. Torres

In this work we propose a new and more general approach to the calculus of variations on time scales that allows to obtain, as particular cases, both delta and nabla results. More precisely, we pose the problem of minimizing or maximizing…

Optimization and Control · Mathematics 2010-08-30 Ewa Girejko , Agnieszka B. Malinowska , Delfim F. M. Torres

We deal with direct and inverse problems of the calculus of variations on arbitrary time scales. Firstly, using the Euler-Lagrange equation and the strengthened Legendre condition, we give a general form for a variational functional to…

Optimization and Control · Mathematics 2017-10-03 Monika Dryl , Delfim F. M. Torres

We prove Euler-Lagrange and natural boundary necessary optimality conditions for problems of the calculus of variations which are given by a composition of nabla integrals on an arbitrary time scale. As an application, we get optimality…

Optimization and Control · Mathematics 2011-09-27 Agnieszka B. Malinowska , Delfim F. M. Torres

We show that for any variational symmetry of the problem of the calculus of variations on time scales there exists a conserved quantity along the respective Euler-Lagrange extremals.

Optimization and Control · Mathematics 2008-03-19 Zbigniew Bartosiewicz , Delfim F. M. Torres

We develop the calculus of variations on time scales for a functional that is the composition of a certain scalar function with the delta and nabla integrals of a vector valued field. Euler-Lagrange equations, transversality conditions, and…

Optimization and Control · Mathematics 2013-06-13 Monika Dryl , Delfim F. M. Torres

We introduce a discrete-time fractional calculus of variations. First and second order necessary optimality conditions are established. Examples illustrating the use of the new Euler-Lagrange and Legendre type conditions are given. They…

Optimization and Control · Mathematics 2010-10-28 Nuno R. O. Bastos , Rui A. C. Ferreira , Delfim F. M. Torres

We prove a Noether-type symmetry theorem and a DuBois-Reymond necessary optimality condition for nabla problems of the calculus of variations on time scales.

Optimization and Control · Mathematics 2010-09-06 Natalia Martins , Delfim F. M. Torres

In this paper we consider the problem of the calculus of variations for a functional which is the composition of a certain scalar function $H$ with the delta integral of a vector valued field $f$, i.e., of the form…

Optimization and Control · Mathematics 2010-10-28 Agnieszka B. Malinowska , Delfim F. M. Torres

We begin by presenting the classical deterministic problems of the calculus of variations, with emphasis on the necessary optimality conditions of Euler-Lagrange and the Noether theorem. As examples of application, we obtain the…

Optimization and Control · Mathematics 2012-08-29 Adilson C. M. Barros , Delfim F. M. Torres

We obtain Euler-Lagrange and transversality optimality conditions for higher-order infinite horizon variational problems on a time scale. The new necessary optimality conditions improve the classical results both in the continuous and…

Optimization and Control · Mathematics 2012-11-13 Natalia Martins , Delfim F. M. Torres

The fundamental problem of the calculus of variations on time scales concerns the minimization of a delta-integral over all trajectories satisfying given boundary conditions. This includes the discrete-time, the quantum, and the…

Optimization and Control · Mathematics 2010-09-29 Agnieszka B. Malinowska , Delfim F. M. Torres

We prove a necessary condition for a dynamic integro-differential equation to be an Euler-Lagrange equation. New and interesting results for the discrete and quantum calculus are obtained as particular cases. An example of a second order…

Optimization and Control · Mathematics 2017-01-09 Monika Dryl , Delfim F. M. Torres

We consider a general problem of the calculus of variations on time scales with a cost functional that is the composition of a certain scalar function with delta and nabla integrals of a vector valued field. Euler-Lagrange delta-nabla…

Optimization and Control · Mathematics 2015-09-15 Monika Dryl , Delfim F. M. Torres

We consider problems of the calculus of variations on unbounded time scales. We prove the validity of the Euler-Lagrange equation on time scales for infinite horizon problems, and a new transversality condition.

Optimization and Control · Mathematics 2011-01-04 Agnieszka B. Malinowska , Natalia Martins , Delfim F. M. Torres
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