Matematik-Makale Koleksiyonu: Recent submissions
Now showing items 421-440 of 503
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Some new contractive mappings on S-metric spaces and their relationships with the mapping (S25)
(Springer Heidelberg, 2017)Recently, S-metric spaces are introduced as a generalization of metric spaces. In this paper, we consider the relationships between of an S-metric space and a metric space, and give an example of an S-metric which does not ... -
On translation surfaces in 4-dimensional Euclidean space
(Univ Tartu Press, 2016)We consider translation surfaces in Euclidean spaces. Firstly, we give some results of translation surfaces in the 3-dimensional Euclidean space E-3. Further, we consider translation surfaces in the 4-dimensional Euclidean ... -
Optimal control of convective FitzHugh-Nagumo equation
(Pergamon-Elsevier Science Ltd, 2017)We investigate smooth and sparse optimal control problems for convective FitzHugh Nagumo equation with traveling wave solutions in moving excitable media. The cost function includes distributed space time and terminal ... -
Generalized derivatives and approximation in weighted Lorentz spaces
(Belgian Mathematical Soc Triomphe, 2017)In the present article we prove direct, simultaneous and converse approximation theorems by trigonometric polynomials for functions f and (psi, beta)-derivatives of f in weighted Lorentz spaces. -
Conformable fractional gradient based dynamic system for constrained optimization problem
(Polish Acad Sciences Inst Physics, 2017)A conformable fractional gradient based dynamic system with a steepest descent direction is proposed in this paper for a class of nonlinear programming problems. The solutions of the dynamic system, modelled with the ... -
Solution of a class of optimization problems based on hyperbolic penalty dynamic framework
(Polish Acad Sciences Inst Physics, 2017)In this study, a gradient-based dynamic system is constructed in order to solve a certain class of optimization problems. For this purpose, the hyperbolic penalty function is used. Firstly, the constrained optimization ... -
Numerical solution of fractional black-scholes equation by using the multivariate pade approximation
(Polish Acad Sciences Inst Physics, 2017)In this study, a new application of multivariate Pade approximation method has been used for solving European vanilla call option pricing problem. Pade polynomials have occurred for the fractional Black-Scholes equation, ... -
Optimal control problem for a conformable fractional heat conduction equation
(Polish Acad Sciences Inst Physics, 2017)This paper presents an optimal boundary temperature control of thermal stresses in a plate, based on time-conformable fractional heat conduction equation. The aim is to find the boundary temperature that takes thermal ... -
New contractive conditions of integral type on complete S-metric spaces
(Springer Heidelberg, 2017)An S-metric space is a three-dimensional generalization of a metric space. In this paper our aim is to examine some fixed-point theorems using new contractive conditions of integral type on a complete S-metric space. We ... -
On generalized spherical surfaces in euclidean spaces
(Honam Mathematical Soc, 2017)In the present study we consider the generalized rotational surfaces in Euclidean spaces. Firstly, we consider generalized spherical curves in Euclidean (n + 1) space En+1. Further, we introduce some kind of generalized ... -
On some properties of convolutions in variable exponent lebesgue spaces
(Birkhauser Verlag AG, 2017)A convolution in the variable exponent Lebesgue spaces L2πp(·) is defined and its basic properties are investigated. It is also proved that this convolution can be approximated in L2πp(·) by the finite linear combinations ... -
New annuli for the zeros of polynomials
(University of Salento, 2017)The purpose of this paper is to present a new annulus containing all the zeros of a polynomial using a new identity involving generalized Fibonacci numbers. This new annulus is related to two parameters. By examples, it ... -
Approximation in weighted generalized grand Smirnov classes
(Akademiai Kiado Rt., 2017)Let G be a finite simple connected domain in the complex plane C, bounded by a Carleson curve Γ := ∂G. In this work the direct and inverse theorems of approximation theory by the algebraic polynomials in the weighted ... -
Approximation by p-Faber polynomials in the weighted Smirnov class E-P (G,omega) and the Bieberbach polynomials
(Springer-Verlag, 2001)Let G subset of C be a finite domain with a regular Jordan boundary L. In this work, the approximation properties of a p-Faber polynomial series of functions in the weighted Smirnov class EP (G, W) are studied and the rate ... -
The p-cockcroft property of central extensions of groups
(Marcel Dekker Inc, 2001)A presentation for an arbitrary group extension is well known. A generalization of the work by Conway et al. (Group Tenser 1972, 25, 405-418) on central extensions has been given by Balk et al. (J. Group Theor.). As an ... -
An obstruction to finding algebraic models for smooth manifolds with prescribed algebraic submanifolds
(Cambridge Univ Press, 2001)Let N ⊆ M be a pair of closed smooth manifolds and L an algebraic model for the submanifold N. In this paper, we will give an obstruction to finding an algebraic model X of M so that the submanifold N corresponds in X ... -
Fractional order control of fractional diffusion systems subject to ınput hysteresis
(Asme-Amer Soc Mechanical Eng, 2010)This paper concerns the control of a time fractional diffusion system defined in the Riemann-Liouville sense. It is assumed that the system is subject to hysteresis nonlinearity at its input, where the hysteresis is ... -
Normal subgroups of hecke groups h(lambda)
(Springer, 2010)Let lambda >= 2 and let H(lambda) be the Hecke group associated to lambda. Also let H(lambda)\U be the Riemann surface associated to the Hecke group H(lambda). In this article, we study the even subgroup H(e)(lambda) and ... -
On numbers of the form n = x(2) + ny(2) and the hecke groups h(root n)
(Academıc Press Inc Elsevier Science, 2010)We consider the Hecke groups H(root N), N >= 2 integer, to get some results about the problem when a natural number n can be represented in the form n = x(2) + Ny(2). Given a natural number n, we give an algorithm that ... -
Trigonometric approximation in generalized lebesgue spaces l-p(x)
(Element, 2010)The approximation properties of Norlund (N-n) and Riesz (R-n) means of trigonometric Fourier series are investigated in generalized Lebesgue spaces L-p(x). The deviations parallel to f - N-n(f) parallel to(p(x)) and parallel ...
