Yazar "Anadolu Üniversitesi, Fen Fakültesi, Matematik Bölümü" için Fen Fakültesi listeleme
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Dependence on the parameters of the set of trajectories of the control system described by a nonlinear Volterra integral equation
Hüseyin, Anar; Hüseyin, Nesir (Acad Sciences Czech Republic, Inst Mathematics, 2014)In this paper the control system with limited control resources is studied, where the behavior of the system is described by a nonlinear Volterra integral equation. The admissible control functions are chosen from the ... -
Derivatives of the restrictions of harmonic functions on the Sierpinski gasket to segments
Demir, Bünyamin; Dzhafarov, Vakif; Koçak, Şahin; Üreyen, Mehmet (Academic Press Inc Elsevier Science, 2007)We give an explicit derivative computation for the restriction of a harmonic function on SG to segments at specific points of the segments: The derivative is zero at points dividing the segment in ratio 1:3. This shows ... -
Determining the Critical Point of a Sigmoidal Curve via its Fourier Transform
Bilge, Ayşe Hümeyra; Özdemir, Yunus (IOP Publishing LTD, 2016)A sigmoidal curve y(t) is a monotone increasing curve such that all derivatives vanish at infinity. Let t(n) be the point where the nth derivative of y(t) reaches its global extremum. In the previous work on sol-gel ... -
Development of a three dimensional geometric thinking test for early graders
Akkurt Denizli, Zeynep; Erdoğan, A. (Sriwijaya University, 2018)This study aimed to develop a three-dimensional geometric thinking test to determine the geometric thinking of early graders in the paper-pencil environment. First, we determined the components of three-dimensional geometric ... -
Diagonal stability of uncertain interval systems
Dzhafarov, Vakif; Büyükköroğlu, Taner; Yıldız, B. (SciTePress, 2015)In this paper we consider the problem of diagonal stability of interval systems. We investigate the existence and evaluation of a common diagonal solution to the Lyapunov and Stein matrix inequalities for third order ... -
Diagonal Stability of Uncertain Interval Systems
Dzhafarov, Vakif; Büyükköroğlu, Taner; Yıldız, Bengi (IEEE, 2015)In this paper we consider the problem of diagonal stability of interval systems. We investigate the existence and evaluation of a common diagonal solution to the Lyapunov and Stein matrix inequalities for third order ... -
Dirac Operator on a 7-Manifold with Deformed G(2) Structure
Özdemir, Nülifer; Aktay, Şirin (Ovidius University Press, 2012)In this work, we consider the deforming of a G(2) structure by a vector field on a 7-manifold. To obtain the metric corresponding to deformed G(2) structure, a new map is defined. By using this new map, the co-variant ... -
Directional convex extensions of the convex valued maps
Düzce, S. A.; Guseinov, Khalik G. (2009)In this paper, the concept of directional convex extension of the convex valued maps is introduced. Necessary and sufficient conditions for the existence of the directional convex extension of the convex valued map are obtained -
Discrete Time Stability Margins From Stein's Equation
Yıldız, Bengi; Dzhafarov, Vakif; Bhattacharyya, Shankar P. (IEEE, 2015)This paper deals with the robust stability of a discrete time stable state space system subject to structured real parameter uncertainty. Using Lyapunov's Theorem and Stein's equation the radius of a stability hypersphere ... -
Ebu'l- Vefa' nın trigonometri cetvelleri
Üreyen, Mehmet (2002)Matematik tarihi ile ilgili eserlerde, Ebu'l-Vefâ'nın onuncu yüzyılda astronomi ile ilgili çalışmalarının yanında düzlemsel ve küresel trigonometri konusunda da önemli çalışmaları olduğu ve 15' aralıkla sinüs cetveli ... -
Effects of shear stress forces to rotordynamic coefficients in staggered labyrinth seals
Dereli, Yılmaz; Eser, D. (Professional Engineering Publishing LTD, 2006)In this article, shear stresses in calculating the rotordynamic coefficients of staggered labyrinth seals are presented. Differences in the values of these coefficients are observed and quantified. The results of the present ... -
An equivalence class decomposition of finite metric spaces via Gromov products
Bilge, Ayşe Hümeyra; Çelik, Derya; Koçak, Şahin (Elsevier Science BV, 2017)Let (X, d) be a finite metric space with elements P-i, i = 1,..., n and with the distance functions d(ij) The Gromov Product of the "triangle" (P-i, P-j, P-k) with vertices P-t, P-j and P-k at the vertex Pi is defined by ... -
An estimate of the oscillation of harmonic reproducing kernels with applications
Üreyen, Adem Ersin (Academic Press Inc Elsevier Science, 2016)We estimate the oscillation of harmonic reproducing kernels. As an application of this estimation we obtain a double integral characterization of harmonic Besov spaces -
Euclidean realizations of Mauldin-Williams graphs
Graph-directed fractals are collections of metric spaces, each of which can be expressed as a union of several scaled copies of spaces from the collection. They give rise to weighted, directed graphs where the term comes ... -
The Euler characteristic and signature of four-dimensional closed manifolds and the normalized Ricci flow equation
Limoncu, Murat (Springer, 2016)Let M be a closed manifold of dimension four, and let [0, T) be the maximal time interval for the normalized Ricci flow equation. We prove that, if the normalized Ricci flow equation has a solution on the non-negative real ... -
Evaluation of 11th grade students' cognitive behaviour on some subjects of analysis according to gender
Orhun, Nevin (2005)The purpose of this research is to investigate students' cognitive behaviour in the subjects of function, limit, and derivative according to gender. The research was conducted with the participation of 67 female and 58 ... -
Existence and monotone iteration of concave positive symmetric solutions for a three-point second-order boundary value problems with integral boundary conditions
Akcan, Ummahan; Hamal, Nuket Aykut (Dynamic Publishers, 2015)In this article, we make use of the monotone iterative technique to verify the existence of concave symmetric positive solutions of a second-order three-point boundary value problem with integral boundary conditions. The ... -
Existence and Monotone Iteration of Concave Positive Symmetric Solutions for a Three-Point Second-Order Boundary Value Problems With Integral Boundary Conditions
Akcan, Ummahan; Hamal, Nuket Aykut (Dynamic Publishers, Inc, 2015)In this article, we make use of the monotone iterative technique to verify the existence of concave symmetric positive solutions of a second-order three-point boundary value problem with integral boundary conditions. The ... -
Existence of a dense orbit and topological transitivity: When are they equivalent?
Değirmenci, Nedim; Koçak, Şahin (Akademiai Kiado, 2003)Topological transitivity and existence of a dense orbit are two notions which play an important role in every definition of chaos [2], [4]. Unfortunately, in the literature there are often misunderstandings (or even false ... -
Existence of concave symmetric positive solutions for a three-point boundary value problems
Akcan, Ummahan; Hamal, Nuket Aykut (Springer International Publishing Ag, 2014)In this paper, we investigate the existence of triple concave symmetric positive solutions for the nonlinear boundary value problems with integral boundary conditions. The proof is based upon the Avery and Peterson fixed ...