Güncel Gönderiler: Dergiler / Journals
Toplam kayıt 1131, listelenen: 441-460
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On leap Zagreb indices of some cycle related graphs
(Işık University Press, 2022)Let G = (V, E) represent a graph. The 2-degree of a vertex v in G is the number of vertices which are at distance two from v and denoted by d₂(v). The leap Zagreb indices are the recently introduced distance-based topological ... -
The mean reverting Ornstein-Uhlenbeck processes with nonlinear autoregressive drift term innovations
(Işık University Press, 2022)The main purpose of this paper is to present a new approach for energy markets governed by a two-factor Ornstein-Uhlenbeck process with a stochastic nonlinear autoregressive drift term innovation and an unknown diffusion ... -
Numerical solution of second order linear hyperbolic telegraph equation
(Işık University Press, 2022)This paper is of about a numerical solution of the second order linear hyperbolic telegraph equation. To solve numerically the second order linear hyperbolic telegraph equation, the cubic B-spline collocation method is ... -
Some results on graceful centers of Pn and related α-graceful graphs
(Işık University Press, 2022)In this paper, we have proved that the graph obtained by joining two copies of a bipartite graceful graph by an edge with any two corresponding vertices of both the copies of graphs is α-graceful. We also proved path step ... -
A novel third kind Chebyshev wavelet collocation method for the numerical solution of stochastic fractional Volterra integro-differential equations
(Işık University Press, 2022)In the formulation of natural processes like emissions, population development, financial markets, and the mechanical systems, in which the past affect both the present and the future, Volterra integro-differential equations ... -
Fixed point theorems of fuzzy partial metric spaces
(Işık University Press, 2022)Fuzzy metric space has been defined using fuzzy numbers by many researchers. Recently Xia and Guo [20] have introduced fuzzy metric space using fuzzy scalars which is similar to the classical metric space. In this work we ... -
Almost periodic positive solutions for a delayed nonlinear density dependent mortality Nicholson’s blowflies model on time scales
(Işık University Press, 2022)In this paper we discuss a nonlinear density dependent mortality Nicholson’s blowflies equation with multiple pairs of time varying delays. By contraction mapping theorem, we derived the necessary conditions for the existence ... -
A minimax inequality and its applications
(Işık University Press, 2022)A minimax inequality of Ky Fan for mapping with non-compact domain is given. Moreover, some minimax inequalities are obtained. -
Recurrence relations for moments of Progressively Type-II Censored from Weibull-Rayleigh distribution and its characterizations
(Işık University Press, 2022)This paper is devoted to get new recurrence relations satisfied by the single and product moments based on Progressively Type-II Censored (ProgT-II) from the three parameters Weibull-Rayleigh distribution (WRD) and doubly ... -
‘Del’ relation and parallelism in fuzzy lattices
(Işık University Press, 2022)The notions of ‘del’ relation, a neutral element and parallelism from lattice theory are introduced in a fuzzy lattice and their properties are obtained. -
Numerical solutions of nonlinear parabolic equations with Robin condition: Galerkin approach
(Işık University Press, 2022)In this paper, classical solutions of nonlinear parabolic partial differential equations with the Robin boundary condition are approximated using the Galerkin finite element method (GFEM) which is associated with the ... -
State estimation of a chaotic Galton board model
(Işık University Press, 2022)In this study, the application of the gradient descent of indeterminism (GDI) shadowing filter to a recently proposed chaotic Galton board model is presented and discussed. It is found that the original GDI shadowing filter ... -
Shearlet shrinkage with integro-differential equations using 3-dimensional continuous shearlet transform
(Işık University Press, 2022)The generalization of continuous wavelet, a directional multiscale is known as continuous shearlet which is able to study the directional functions and distributions. Many useful features do not carry from 2-dimensional ... -
Inverse problem for Albertson irregularity index
(Işık University Press, 2022)Graph indices have attracted great interest as they give us numerical clues for several properties of molecules. Some indices give valuable information on the molecules under consideration using mathematical calculations ... -
On the orbits of some metabelian groups
(Işık University Press, 2022)In this study, the orbits of non abelian metabelian groups of order 26, 28 and 30 are found using conjugation action. The non abelian metabelian groups considered in this study are some dihedral groups D₁₃, D₁₄ and D₁₅ as ... -
Introduction to total dominator edge chromatic number
(Işık University Press, 2022)We introduce the total dominator edge chromatic number of a graph G. A total dominator edge coloring (briefly TDE-coloring) of G is a proper edge coloring of G in which each edge of the graph is adjacent to every edge of ... -
Determination of a nonlinear source term in a reaction-diffusion equation by using finite element method and radial basis functions method
(Işık University Press, 2022)In this paper, two numerical methods are presented to solve a nonlinear inverse parabolic problem of determining the unknown reaction term in the scalar reactiondiffusion equation. In the first method, the finite element ... -
Rough cubic Pythagorean fuzzy sets in semigroup
(Işık University Press, 2022)In this paper, we intend the concept of rough cubic Pythagorean fuzzy ideals in the semigroup. By using this notion, we discuss lower approximation and upper approximation of cubic Pythagorean fuzzy left (right) ideals, ... -
On bivariate credibility estimator with GLM theory
(Işık University Press, 2022)Credibility theory is one of the cornerstones of actuarial science as applied to casualty and property insurance, based on the concept of limiting the estimator of individual premium to the class of estimators that are ... -
Approximation by De La Vallée Poussin means in weighted generalized grand Smirnov classes
(Işık University Press, 2022)Let G be a simple connected domain on complex plane such that Γ := ∂G where Γ is a Carleson curve. In this work, we investigate the rate of approximation by De La Vall´ee Poussin mean constructed via p − ε Faber series in ...
