Yazar "RTEÜ, Fen - Edebiyat Fakültesi, Matematik Bölümü" için FEF, Matematik Bölümü Koleksiyonu listeleme
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An existing problem for symmetric design: Bruck Ryser Chowla Theorem
Demirci Akarsu, Emek; Öztürk, Safiye (Sakarya University, 2022)Symetric designs are interesting objects of combinatorics, and have some relations with coding theory, difference sets, geometry and finite group theory. They have applications on statistics and design experiments. In ... -
Explicit formulas for exponential of 2×2 split-complex matrices
Çakır, Hasan; Özdemir, Mustafa (Ankara University, 2022)Split-complex (hyperbolic) numbers are ordered pairs of real numbers, written in the form x + jy with j(2) - 1, used to describe the geometry of the Lorentzian plane. Since a null split-complex number does not have an ... -
An extension method for t-norms on subintervals to t-norms on bounded lattices
Karaçal, Funda; Ertuğrul, Ümit; Kesicioğlu, Mücahide Nesibe (Kybernetika, 2019)In this paper, a construction method on a bounded lattice obtained from a given t-norm on a subinterval of the bounded lattice is presented. the supremum distributivity of the constructed t-norm by the mentioned method is ... -
Family of surface with a common null geodesic
Şaffak, Gülnur; Kasap, Emin (2009)We analyzed the problem of finding a surfaces family through a null curve with Cartan frame. We constructed a differential equation system such that a given null curve is an isogeodesic curve on a surface. In addition, ... -
Fourier method for a quasilinear parabolic equation with periodic boundary condition
Çiftçi, İrem; Halilov, Hüseyin (Hacettepe University, 2008)A multidimensional mixed problem with Neuman type periodic boundary condition is studied for the quasilinear parabolic equation ?u/?t-a2 ?2u/?x2 = f(t, x, u). The existence, uniqueness and also continuity of the weak ... -
Fourier method for a quasilinear pseudo-parabolic equation with periodic boundary condition
Halilov, Hüseyin; Çiftçi, İrem (2009)A multidimensional mixed problem with Neuman type periodic boundary condition is studied for quasilinear pseudo-parabolic equation ?u/?ta2 ?2u/?x2 - ? ?3u/?t?x2 = f(t, x, u). The existence, uniqueness and also convergence ... -
Further remarks on group-2-groupoids
Temel, Sedat (Unıversitat Polıtecnıca Valencıa, 2021)The aim of this paper is to obtain a group-2-groupoid as a 2-groupoid object in the category of groups and also as a special kind of an internal category in the category of group-groupoids. Corresponding group-2-groupoids, ... -
Generalization of intuitionistic fuzzy submodules of a module by using triangular norms and conorms and (T,S)-L subrings
Deniz, Ümit (Springer, 2023)This study consists of two parts. In first part; It is built on the definition of Intuitionistic Fuzzy Submodules of a Module. Many researchers have used the definition of Atanassov’s (Fuzzy Sets Syst 20:87–96, [1]) ... -
Generalized beta parameters for a SVEIR-type random model of Polio transmission
Bekiryazıcı, Zafer; Merdan, Mehmet; Kesemen, Tülay (Amer Inst Physics, 2018)In this study, a SVEIR-type compartmental model of Poliomyelitis transmission is examined under random effects. We introduce Generalized Beta and normal distributed random parameters into the equation system to investigate ... -
Generalized convex combination of implications on bounded lattices
Kesicioğlu, Mücahide Nesibe; Ertuğrul, Ümit; Karacal, Funda (Univ Sistan & Baluchestan, 2020)In this paper, the notions of the linear and g-convex combination for implications which extend the notion of convex combination of fuzzy implications on the unit interval to bounded lattices are introduced. A necessary ... -
Generalized convex combination of triangular norms on bounded lattices
Karacal, Funda; Kesicioğlu, Mücahide Nesibe; Ertuğrul, Ümit (Taylor & Francis Ltd, 2020)In this paper, we introduce the notions of the linear and generalized convex combination (shortly, g-convex combination) for triangular norms on bounded lattices. We investigate the conditions for the g-convex combination ... -
Generalized correlation coefficients of intuitionistic multiplicative sets and their applications to pattern recognition and clustering analysis
Köseoğlu, Ali (Taylor & Francis Ltd., 2024)Intuitionistic multiplicative preference relations (IMPRs) and intuitionistic multiplicative sets (IMSs) play a significant role in real-life problems that contain unsymmetrical and nonuniform information. Correlation ... -
The generalized Marchenko Method in the inverse scattering problem for a first-order linear system with energy-dependent potentials
Aktosun, Tuncay; Ercan, Ramazan; Ünlü, Mehmet (2023)The Marchenko method is developed in the inverse scattering problem for a linear system of first-order differential equations containing potentials proportional to the spectral parameter. The corresponding Marchenko system ... -
A generalized method for the Darboux transformation
Aktosun, Tuncay; Ünlü, Mehmet (AIP Publishing, 2022)A method is presented to obtain the change in the potential and in the relevant wavefunction of a linear system of ordinary differential equations containing a spectral parameter, when that linear system is perturbed and ... -
Generalized osculating curves of type (n-3) in the n-dimensional Euclidean space
Bektaş, Özcan; Bekiryazıcı, Zafer (Ankara University, 2022)In this paper, we give a generalization of the osculating curves to the n-dimensional Euclidean space. Based on the definition of an osculating curve in the 3 and 4 dimensional Euclidean spaces, a new type of osculating ... -
Generating methods for principal topologies on bounded lattices
Karaçal, Funda; Ertuğrul, Ümit; Kesicioğlu, Mücahide Nesibe (Kybernetika, 2021)In this paper, some generating methods for principal topology are introduced by means of some logical operators such as uninorms and triangular norms and their properties are investigated. Defining a pre-order obtained ... -
Global dynamics of a cooperative discrete system in the plane
Bilgin, Arzu; Brett, Ann; Kulenovic, Mustafa R. S.; Pilav, Esmir (World Scientific Publ Co Pte Ltd, 2018)In this paper, we consider the cooperative system x(n+1) = ax(n) + by(n)(2)/1 + y(n)(2), y(n+1) = cx(n)(2)/1 + x(n)(2) + dy(n), n = 0, 1, ... , where all parameters a, b, c, d are positive numbers and the initial conditions ... -
Global stability in a pathogen-specific cd8 immune response prediction model
Anaç, Halil; Merdan, Mehmet; Bekiryazıcı, Zafer (Yildiz Technical Univ, 2019)In this study, a system of ordinary differential equations used for modeling pathogen-specific CD8 cell immune response is studied. the positivity and the limitation of the model solutions are proven. the equilibrium points ... -
Group-2-groupoids and 2G-crossed modules
Alemdar, Nazmiye; Temel, Sedat (2019)In this paper, we introduce the notion of a group-2-groupoid as a group object in the category of 2-groupoids. We also obtain a 2G-crossed module by using the structure of a group-2-groupoid. Then we prove that the category ... -
Growth modelling based on different feeding protocols of turbot (Psetta maxima)
Şengül, Süleyman; Yazır, Devran; Atasaral, Şebnem; Kocabaş, Mehmet (Wiley, 2022)Turbot (Psetta maxima) is a commercially valuable species in aquaculture, and the new strategies and models for growth are essential for rapid growth in aquaculture operations. Hence, the objectives of this study were to ...