Results 11 to 20 of about 1,884 (305)

Fractional calculus of variations of several independent variables [PDF]

open access: greenThe European Physical Journal Special Topics, 2013
We prove multidimensional integration by parts formulas for generalized fractional derivatives and integrals. The new results allow us to obtain optimality conditions for multidimensional fractional variational problems with Lagrangians depending on ...
Tatiana Odzijewicz   +2 more
core   +6 more sources

Calculus of Variations on Time Scales and Discrete Fractional Calculus [PDF]

open access: green, 2010
Doutoramento em MatemáticaEstudamos problemas do cálculo das variações e controlo óptimo no contexto das escalas temporais. Especificamente, obtemos condições necessárias de optimalidade do tipo de Euler–Lagrange tanto para lagrangianos dependendo de ...
Rui A. C. Ferreira
core   +5 more sources

A Generalized Fractional Calculus of Variations [PDF]

open access: green, 2013
We study incommensurate fractional variational problems in terms of a generalized fractional integral with Lagrangians depending on classical derivatives and generalized fractional integrals and derivatives.
Tatiana Odzijewicz
core   +5 more sources

Fractional Calculus of Variations: A Novel Way to Look At It [PDF]

open access: greenFractional Calculus and Applied Analysis, 2019
In this work we look at the original fractional calculus of variations problem in a somewhat different way. As a simple consequence, we show that a fractional generalization of a classical problem has a solution without any restrictions on the derivative-order $α$.
Rui A C Ferreira, Ferreira Rui A C
exaly   +6 more sources

Advanced Methods in the Fractional Calculus of Variations

open access: yesSpringerBriefs in Applied Sciences and Technology, 2015
This brief presents a general unifying perspective on the fractional calculus. It brings together results of several recent approaches in generalizing the least action principle and the Euler–Lagrange equations to include fractional derivatives.
Agnieszka B Malinowska   +2 more
exaly   +3 more sources

Modified Mittag-Leffler Functions with Applications in Complex Formulae for Fractional Calculus

open access: yesFractal and Fractional, 2020
Mittag-Leffler functions and their variations are a popular topic of study at the present time, mostly due to their applications in fractional calculus and fractional differential equations.
Arran Fernandez, Iftikhar Husain
doaj   +2 more sources

Fractional Calculus of Variations for Composed Functionals with Generalized Derivatives

open access: yesFractal and Fractional
This paper extends the fractional calculus of variations to include generalized fractional derivatives with dependence on a given kernel, encompassing a wide range of fractional operators.
Ricardo Almeida
doaj   +2 more sources

Fractional calculus of variations for double integrals [PDF]

open access: yes, 2011
We consider fractional isoperimetric problems of calculus of variations with double integrals via the recent modified Riemann-Liouville approach. A necessary optimality condition of Euler-Lagrange type, in the form of a multitime fractional PDE, is ...
Odzijewicz, T.   +3 more
core   +4 more sources

Enhancing variable frequency drive efficiency using fractional hybrid Particle Swarm Optimization and comprehensive thermal management [PDF]

open access: yesScientific Reports
This study proposes a Fractional Calculus Hybrid Approach to enhance the dynamic and thermal performance of vector-controlled Permanent Magnet Synchronous Motor (PMSM) drives.
Kashif Habib   +6 more
doaj   +2 more sources

Fractional Damping Through Restricted Calculus of Variations [PDF]

open access: greenJournal of Nonlinear Science, 2021
Key words and phrases: Continuous/discrete Lagrangian and Hamiltonian modelling, fractional derivatives, fractional dissipative systems, fractional differential equations, variational principles, variational integrators. 30 pages, 7 figures. Constructive comments are welcome!!
Fernando Jiménez, Sina Ober‐Blöbaum
openalex   +6 more sources

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