Yazar "RTEÜ, Fen - Edebiyat Fakültesi, Matematik Bölümü" için Scopus İndeksli Yayınlar Koleksiyonu listeleme
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Determination of the smallest-greatest uni-nullnorms and null-uninorms on an arbitrary bounded lattice L
İnce, Mehmet Akif; Karaçal, Funda (World Stientific Publishing, 2023)In this paper, we study uni-nullnorms and null-uninorms on bounded lattices, which are generalizations of uninorms, nullnorms, t-norms and t-conorms. We construct two uni-nullnorms and two null-uninorms on a bounded lattice ... -
Deterministic stability and random behavior of a Hepatitis C model
Merdan, Mehmet; Bekiryazıcı, Zafer; Kesemen, Tülay; Khanlyev, Tahir (Public Library Science, 2017)The deterministic stability of a model of Hepatitis C which includes a term defining the effect of immune system is studied on both local and global scales. Random effect is added to the model to investigate the random ... -
Differential transform solution of some linear wave equations with mixed nonlinear boundary conditions and its blow up
Cansu, Ümmügülsüm; Özkan, Ozan (2010)Using Differential Transform to solve blow up solutions of some linear wave equation with mixed non-linear boundary conditions is proposed in this study.Non-linear boundary conditions cause the finite time blow up in ... -
Disconnectedness of the subgraph F-3 for the group Gamma(3)
Akbaş, Mehmet; Kor, Tuncay; Kesicioğlu, Yavuz (Springeropen, 2013)In this paper we show that the subgraph F-3 is disconnected and that for all integers m, we find all integers a and b such that (9m(2) - 4)a(2) + 4 and 5b(2) +/- 4 are square. It turns out that the set of numbers b comprises ... -
Eigenvalues and eigenfunctions of discontinuous two-point boundary value problems with an eigenparameter in the boundary condition
Çalışkan, Seda Kızılbudak; Bayramov, Azad; Oer, Zerrin; Uslu, Serpil Öztürk (Rocky Mt Math Consortium, 2013)In this paper we get asymptotic formulas for eigenvalues and eigenfunctions of discontinuous two-point boundary value problems with the eigenparameter in the boundary conditions with transmission conditions at the two ... -
Elliptic elements and circuits in suborbital graphs
Güler, B.Ö.; Beşenk, Mert; Değer, A.H.; Kader, S. (Hacettepe University, 2011)We consider the action of a permutation group on a set in the spirit of the theory of permutation groups, and graph arising from this action in hyperbolic geometric terms. In this paper, we examine some relations between ... -
An equivalence relation based on the U-partial order
Kesicioğlu, Mücahide Nesibe; Ertuğrul, Ümit; Karacal, Funda (Elsevier Science Inc, 2017)In this paper, an equivalence relation on the class of uninorms induced by the U-partial order is discussed. Defining the set of all incomparable elements w.r.t. the U-partial order, this set is deeply investigated and ... -
Evaluation of the convolution sum ∑al+bm=nσ(l)σ3(m) for (a,b)=(1,7),(7,1),(1,8),(8,1),(1,9),(9,1) and representations by certain quadratic forms in twelve variables
Alaca, Şaban; Kesicioğlu, Yavuz (Springer, 2023)For a positive integer n we evaluate the convolution sum Sigma(al+ bm=n) sigma(l) sigma(3)(m) for (a, b) = (1, 7), (7, 1), (1, 8), (8, 1), (1, 9), (9, 1) . We then use these evaluations together with knownevaluations of ... -
Evaluation of the convolution sums Sigma(l+27m=n) sigma(l)sigma(m) and Sigma(l+32m=n) sigma(l)sigma(m)
Alaca, Şaban; Kesicioğlu, Yavuz (World Scientific Publ Co Pte Ltd, 2016)We determine the convolution sums Sigma(l+27m= n) sigma(l)sigma(m) and Sigma(l+32m= n) sigma(l)sigma(m) for all positive integers n. We then use these evaluations together with known evaluations of other convolution sums ... -
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 ... -
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 ...