Güncel Gönderiler: Isik University Institutional Repository
Toplam kayıt 3614, listelenen: 1641-1660
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A new class of non normal operators on Hilbert spaces
(Işık University Press, 2023-01)We introduce the class of (M, k)-quasi-parahyponormal operators on a separable Hilbert space as an extension of the classes of parahyponormal and k-quasiparahyponormal operators given in [13]. The matrix representation of ... -
Optimal control analysis of the malaria model with saturated treatment
(Işık University Press, 2023-01)Malaria is a disease which is transmitted through the bite of an infected Anopheles mosquito. According to WHO report, 400.000 people die worldwide from malaria disease annually. We extend a Susceptible-Infective-Susceptible ... -
The hub number of a fuzzy graph
(Işık University Press, 2023-01)In this paper, we introduced the concepts of hub number in fuzzy graph and is denoted by h(G). The hub number of fuzzy graph G is the minimum fuzzy cardinality among all minimal fuzzy hub sets . We determine the hub number ... -
Some new existence results for boundary value problems involving ?-Caputo fractional derivative
(Işık University Press, 2023-01)This paper concerns the boundary value problem for a fractional differential equation involving a generalized Caputo fractional derivative in b?metric spaces. The used fractional operator is given by the kernel k(t, s) = ... -
On the vertex degree polynomial of graphs
(Işık University Press, 2023-01)A novel graph polynomial, termed as vertex degree polynomial, has been conceptualized, and its discriminating power has been investigated regarding its coefficients and the coefficients of its derivatives and their relations ... -
Functional variable method to the Chiral nonlinear Schrodinger equation
(Işık University Press, 2023-01)In this paper, we study the different types of new soliton solutions to the Chiral nonlinear Schrodinger equation with the aid of the functional variable method. Then, we get some special soliton solutions for Chiral ... -
An introduction to Pythagorean fuzzy hyperideals in hypersemigroups
(Işık University Press, 2023-01)As the generalization of intuitionistic fuzzy set, Pythagorean fuzzy set was introduced. It is a pair of membership and non-membership grade where the sum of the squares of membership and non-membership grade should be ... -
Spectral inclusion between a regularized quasi-semigroups and their generators
(Işık University Press, 2023-01)The notion of a regularized quasi-semigroups (or C-quasi-semigroups) of a bounded linear operators, as a generalization of C0-quasi-semigroups of a bounded linear operators, was introduced by M. Janfada in 2010. In this ... -
Riesz MRA of dyadic dilations and the corresponding Riesz wavelet on LCA groups
(Işık University Press, 2023-01)We have explored the concept of Riesz multiresolution analysis (Riesz MRA) on a locally compact Abelian group G, and have done a detailed study of the methods of construction of a Riesz wavelet from the given Riesz MRA. ... -
Several types of single-valued neutrosophic ideals and filters on a lattice
(Işık University Press, 2023-01)In this paper, we introduce and study the notions of prime, maximal and principal single-valued neutrosophic ideals (resp. filters) on a lattice. Several properties and characterizations of these types of ideals and filters ... -
A generalization of relation-theoretic contraction principle
(Işık University Press, 2023-01)In the present paper, we generalize relation-theoretic contraction principle using weaker class of contraction mappings which is assumed to be hold on the elements of a particular subset of the whole space, whose elements ... -
Applying multiquadric quasi-interpolation to solve Fokker-Planck equation
(Işık University Press, 2023-01)The Fokker-Planck equation (FPE) arises in various fields in physics, chemistry, natural science. It is difficult to obtain analytical solutions, accordingly we resort to numerical methods. In this study, we present a ... -
Regularized trace on separable Banach spaces
(Işık University Press, 2023-01)If H is a separable Hilbert space, Gül (2008) has shown that a regularized trace formula can be computed on L² (H, [0, ?]) for a second order differential operator with bounded operator-valued coefficients, where H is a ... -
Contraction and domination in fuzzy graphs
(Işık University Press, 2023-01)Fuzzy sets and logics is a true crowning achievement of the century. Among the variety of exemplary changes in science and technology, the concept of uncertainty played a significant role, which led to the development of ... -
A piecewise analytical iterative method for a wire-mass model
(Işık University Press, 2023-01)A wire-mass model is considered, where the wire is elastic and the mass is attached to the wire. We propose a piecewise analytical iterative method for simulating the motion of the mass attached to the wire. Our proposed ... -
Determination of a time-dependent coefficient in the time-fractional wave equation with a non-classical boundary condition
(Işık University Press, 2023-01)In this paper, an initial-boundary value problem for the time-fractional wave equation is considered. Given an additional condition, a time-dependent coefficient is determined and the existence and uniqueness theorem for ... -
Spherical fuzzy matrices
(Işık University Press, 2023-01)In this paper, we introduce spherical fuzzy matrices (SFMs) which is an advanced tool of the fuzzy matrices, intuitionistic fuzzy matrices and picture fuzzy matrices. We investigate the basic properties of SFMs and compare ... -
Numerical optimization algorithm based on genetic algorithm for a data completion problem
(Işık University Press, 2023-01)This work presents numerical optimization algorithm based on genetic algorithm to solve the data completion problem for Laplace’s equation. It consists of covering the missing data on the inaccessible part of the boundary ... -
An iterative method for solving time-fractional partial differential equations with proportional delays
(Işık University Press, 2023-01)This article deals with an iterative method which is a new formulation of Adomian decomposition method for solving time-fractional partial differential equations (TFPDEs) with proportional delays. The fractional derivative ... -
Bayesian estimation using Lindley’s approximation of Inverted Kumaraswamy distribution based on lower record values
(Işık University Press, 2023-01)In this paper, we have considered estimation of unknown parameters based on lower record values for Inverted Kumaraswamy distribution. Maximum likelihood and approximate Bayes estimators based on lower record values for ...
