English
Related papers

Related papers: Diamond-alpha Integral Inequalities on Time Scales

200 papers

The theory and applications of dynamic derivatives on time scales has recently received considerable attention. The primary purpose of this paper is to give basic properties of diamond-$\alpha$ derivatives which are a linear combination of…

Classical Analysis and ODEs · Mathematics 2008-08-27 Moulay Rchid Sidi Ammi , Rui A. C. Ferreira , Delfim F. M. Torres

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

We define a more general type of integral on time scales. The new diamond integral is a refined version of the diamond-alpha integral introduced in 2006 by Sheng et al. A mean value theorem for the diamond integral is proved, as well as…

Classical Analysis and ODEs · Mathematics 2015-09-11 Artur M. C. Brito da Cruz , Natalia Martins , Delfim F. M. Torres

The discrete, the quantum, and the continuous calculus of variations, have been recently unified and extended by using the theory of time scales. Such unification and extension is, however, not unique, and two approaches are followed in the…

Optimization and Control · Mathematics 2011-09-30 Delfim F. M. Torres

The discrete-time, the quantum, and the continuous calculus of variations have been recently unified and extended. Two approaches are followed in the literature: one dealing with minimization of delta integrals; the other dealing with…

Optimization and Control · Mathematics 2010-05-25 Agnieszka B. Malinowska , Delfim F. M. Torres

We introduce the diamond-alpha exponential function on time scales. As particular cases, one gets both delta and nabla exponential functions. A method of solution of a homogenous linear dynamic diamond-alpha equation on a regular time scale…

Classical Analysis and ODEs · Mathematics 2009-02-16 Dorota Mozyrska , Delfim F. M. Torres

We prove a two dimensional Holder and reverse-Holder inequality on time scales via the diamond-alpha integral. Other integral inequalities are established as well, which have as corollaries some recent proved Hardy-type inequalities on time…

Classical Analysis and ODEs · Mathematics 2010-03-16 Moulay Rchid Sidi Ammi , Delfim F. M. Torres

We study diamond-alpha integrals on time scales. A diamond-alpha version of Fermat's theorem for stationary points is also proved, as well as Rolle's, Lagrange's, and Cauchy's mean value theorems on time scales.

Classical Analysis and ODEs · Mathematics 2009-08-14 Agnieszka B. Malinowska , 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 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

As an efficient mathematical tool, monotonicity rules play an extremely crucial role in the real analysis field. In this paper, we explore some monotonicity rules for quotient of Delta, Nabla and Diamond-Alpha integrals with variable upper…

Classical Analysis and ODEs · Mathematics 2023-12-19 Zhong-Xuan Mao , Xiao-Yue Du , Jing-Feng Tian

We prove new Hardy-type $\alpha$-conformable dynamic inequalities on time scales. Our results are proved by using Keller's chain rule, the integration by parts formula, and the dynamic H\"{o}lder inequality on time scales. When $\alpha=1$,…

General Mathematics · Mathematics 2022-09-08 Ahmed A. El-Deeb , Samer D. Makharesh , Delfim F. M. Torres

In this note we show how one can obtain results from the nabla calculus from results on the delta calculus and vice versa via a duality argument. We provide applications of the main results to the calculus of variations on time scales.

Optimization and Control · Mathematics 2010-01-17 M. Cristina Caputo

We formulate a coherent approach to signals and systems theory on time scales. The two derivatives from the time-scale calculus are used, i.e., nabla (forward) and delta (backward), and the corresponding eigenfunctions, the so-called nabla…

Classical Analysis and ODEs · Mathematics 2016-04-06 Manuel Ortigueira , Delfim F. M. Torres , Juan Trujillo

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 the interval Darboux delta integral (shortly, the $ID$ $\Delta$-integral) and the interval Riemann delta integral (shortly, the $IR$ $\Delta$-integral) for interval-valued functions on time scales. Fundamental properties of…

Classical Analysis and ODEs · Mathematics 2019-07-05 Dafang Zhao , Guoju Ye , Wei Liu , Delfim F. M. Torres

We prove dynamic inequalities of majorisation type for functions on time scales. The results are obtained using the notion of Riemann-Stieltjes delta integral and give a generalization of [App. Math. Let. 22 (2009), no. 3, 416--421] to time…

Classical Analysis and ODEs · Mathematics 2012-11-05 Dorota Mozyrska , Ewa Pawluszewicz , Delfim F. M. Torres

We generalize the Hahn variational calculus by studying problems of the calculus of variations with higher-order derivatives. The symmetric quantum calculus is studied, namely the $\alpha,\beta$-symmetric, the $q$-symmetric, and the Hahn…

Classical Analysis and ODEs · Mathematics 2013-06-07 Artur M. C. Brito da Cruz

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 introduce a fractional calculus on time scales using the theory of delta (or nabla) dynamic equations. The basic notions of fractional order integral and fractional order derivative on an arbitrary time scale are proposed, using the…

Classical Analysis and ODEs · Mathematics 2010-12-08 Nuno R. O. Bastos , Dorota Mozyrska , Delfim F. M. Torres
‹ Prev 1 2 3 10 Next ›