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We introduce the definition of conformable derivative on time scales and develop its calculus. Fundamental properties of the conformable derivative and integral on time scales are proved. Linear conformable differential equations with…

Classical Analysis and ODEs · Mathematics 2018-01-09 Benaoumeur Bayour , Ahmed Hammoudi , 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

This document introduces a generalization of calculus that treats both continuous and discrete variables on an equal footing. This generalization of calculus was developed independently of the "Calculus on Time Scales" literature but may be…

Classical Analysis and ODEs · Mathematics 2013-02-26 Jay Kaminsky

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

A class of Laplace transforms is examined to show that particular cases of this class are associated with production-destruction and reaction-diffusion problems in physics, study of differences of independently distributed random variables…

Classical Analysis and ODEs · Mathematics 2009-11-11 A. M. Mathai , R. K. Saxena , H. J. Haubold

The paper focuses on the numerical approximation of nabla fractional order systems with the conditions of nonzero initial instant and nonzero initial state. First, the inverse nabla Laplace transform is developed and the equivalent infinite…

Signal Processing · Electrical Eng. & Systems 2019-08-26 Yiheng Wei , Jiachang Wang , Peter W Tse , Yong Wang

This work presents an analytical and computational study of fractional-order delay differential equations formulated using both the conformable and Caputo derivatives. For the conformable case, we develop the associated integral,…

This paper investigates the time--domain response of nabla discrete fractional order systems by exploring several useful properties of the nabla discrete Laplace transform and the discrete Mittag--Leffler function. In particular, we…

Dynamical Systems · Mathematics 2022-12-07 Yiheng Wei , Qing Gao , Songsong Cheng , Yong Wang

We establish necessary optimality conditions for variational problems with an action depending on the free endpoints. New transversality conditions are also obtained. The results are formulated and proved using the recent and general theory…

Optimization and Control · Mathematics 2015-02-23 Agnieszka B. Malinowska , Delfim F. M. Torres

This paper revisits the classical notion of sampling in the setting of real-time temporal logics for the modeling and analysis of systems. The relationship between the satisfiability of Metric Temporal Logic (MTL) formulas over…

Logic in Computer Science · Computer Science 2015-03-13 Carlo A. Furia , Matteo Rossi

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

In this article we focus our attention on the relation between a singular linear discrete time system and a singular linear system of fractional nabla difference equations whose coefficients are square constant matrices. By using matrix…

Dynamical Systems · Mathematics 2014-12-09 Charalambos P. Kontzalis , Grigoris Kalogeropoulos

We prove a more general version of the Gruss inequality by using the recent theory of combined dynamic derivatives on time scales and the more general notions of diamond-alpha derivative and integral. For the particular case when alpha = 1,…

Classical Analysis and ODEs · Mathematics 2009-09-18 Moulay Rchid Sidi Ammi , Delfim F. M. Torres

Caputo-Fabrizio fractional delta derivatives on an arbitrary time scale are presented. When the time scale is chosen to be the set of real numbers, then the Caputo-Fabrizio fractional derivative is recovered. For isolated or partly…

Classical Analysis and ODEs · Mathematics 2018-12-17 Dorota Mozyrska , Delfim F. M. Torres , Malgorzata Wyrwas

The determination of the time averages of continuous functions, or discrete time sequences is important for various problems in physics and engineering, and the generalized final-value theorems of the Laplace and z-transforms, relevant to…

Mathematical Physics · Physics 2012-07-25 Emanuel Gluskin , Shmuel Miller

This paper presents a collection of useful formulas of dynamic derivatives on time scales, systematically collected for reference purposes. As an application, we define trigonometric and hyperbolic functions on time scales in such a way the…

Classical Analysis and ODEs · Mathematics 2017-07-21 Delfim F. M. Torres

We investigate the application of conformable derivatives to model critical phenomena near continuous phase transitions. By incorporating a deformation parameter into the differential structure, we derive unified expressions for…

Statistical Mechanics · Physics 2026-01-13 José Weberszpil , Ralf Metzler

In many stochastic models, the observables of interest are naturally encoded in double transforms (e.g., Laplace transforms) that couple spatial and temporal variables. Notably, the double transform often provides the only analytically…

Probability · Mathematics 2026-05-21 Giampaolo Cristadoro , Gaia Pozzoli

In calculus of variations on general time scales, an integral Euler-Lagrange equation is usually derived in order to characterize the critical points of non shifted Lagrangian functionals, see e.g. [R.A.C. Ferreira and co-authors,…

Dynamical Systems · Mathematics 2016-01-14 Loïc Bourdin

We introduce a nabla, a delta, and a symmetric fractional calculus on arbitrary nonempty closed subsets of the real numbers. These fractional calculi provide a study of differentiation and integration of noninteger order on discrete,…

Classical Analysis and ODEs · Mathematics 2015-12-31 Nadia Benkhettou , Artur M. C. Brito da Cruz , Delfim F. M. Torres