Dergiler / Journals: Recent submissions
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Oktay Veliev, Multidimensional Periodic Schrödinger Operator (Perturbation Theories in High Energy Regions and Their Applications)
(Işık University Press, 2026-06-01)Book Review: Oktay Veliev, Multidimensional Periodic Schrödinger Operator (Perturbation Theories in High Energy Regions and Their Applications). Springer, Switzerland, 424 pp., 2024, Springer Tracts in Modern Physics, STMP, ... -
A unified spectral filter framework for ill-posed linear operator equations in Hilbert spaces
(Işık University Press, 2026-06-01)Regularization is useful for stable recovery in inverse problems with ill-posed linear operator equations in Hilbert spaces because small perturbations in data can make problems highly unstable. Tikhonov regularization, ... -
Picture fuzzy characteristic and picture fuzzy divisor of zero in a ring along with their applications in real life situations
(Işık University Press, 2026-06-01)The paper provides the concept of a picture fuzzy ideal over a ring and illustrates it with example. Additionally, it introduces the notions of picture fuzzy characteristic and picture fuzzy divisor of zero in a ring with ... -
An investigation of Pythagorean fuzzy digital convexity
(Işık University Press, 2026-06-01)The aim of this study is to introduce Pythagorean fuzzy digital convex sets, Pythagorean fuzzy digital cut sets, Pythagorean fuzzy digital topological spaces, Pythagorean fuzzy digital generalized closed sets, and Pythagorean ... -
Linear diophantine graphs
(Işık University Press, 2026-06-01)This manuscript introduces linear Diophantine labelling, a new method for assigning labels to the vertices of finite, simple, undirected graphs. A key feature of this method is a divisibility condition imposed on the edges, ... -
Nonoscillatory solutions of certain nonlinear higher order differential and delay differential equations with forcing term
(Işık University Press, 2026-06-01)There are some nonlinear higher order differential and delay equations with forcing term that are taken into consideration. Using the Schauder fixed point theorem, the sufficient conditions for the existence of nonoscillatory ... -
An efficient numerical algorithm for solving the Lane-Emden type functional boundary value problems
(Işık University Press, 2026-06-01)In this article, we analyze collocation points and shifted Chebyshev polynomials based strategy to approximate the solution of the Lane-Emden type functional differential equations subjected to three-point boundary conditions. ... -
Eccentricity spectrum of join of central graphs and eccentricity Wiener index of graphs
(Işık University Press, 2026-06-01)The eccentricity matrix of a simple connected graph is obtained from its distance matrix by preserving the largest non-zero distance in each row and column, while setting all other entries to zero. This article examines ... -
Gibbs measures for the asymmetric clock model on a Cayley tree
(Işık University Press, 2026-06-01)We consider the p-state clock model on the Cayley tree and derive a system of functional equations governing this model. Each positive solution of the system corresponds to a splitting Gibbs measure. Utilizing this framework, ... -
Moduli of continuity for functions in Sobolev spaces and Haar wavelet solutions to fractional Basset equation
(Işık University Press, 2026-06-01)In this paper, the method for solving fractional differential equations have been proposed using the Haar wavelet operational matrix of fractional integration. An operational matrix of fractional integration using the Haar ... -
Control of the technological process of obtaining polypropylene by alkalinizing, washing and drying the propane-propylene fraction (PPF)
(Işık University Press, 2026-05-01)The work is devoted to the control of the technological process of obtaining polypropylene by alkalizing, washing and drying the propane propylene fraction (PPF). As a scientific innovation in the presented work, the ... -
Incorporating the influence of hunting cooperation and competition into the prey-predator model
(Işık University Press, 2026-05-01)This mathematical model consists of three nonlinear ordinary differential equations between two prey (N1, N2) and only one predator (P). The two prey (N1, N2) grow logistically under predator pressure, and the predator ... -
Higher-order accurate compact schemes and analysis for the time-fractional Black-Scholes model
(Işık University Press, 2026-05-01)This work is focused on the construction of numerical schemes with higherorder accuracy in space and time to solve the time-fractional Black-Scholes model that governs the price of European options. We develop three numerical ... -
A characterization of E-completeness in vector metric spaces with an application in fixed point theory
(Işık University Press, 2026-05-01)The main purpose of this article is to introduce the notion of dᵥ-point in a vector metric space which is a generalization of the notion of d-point in metric spaces and extend Weston’s characterization of metric completeness ... -
Some properties of fuzzy disjointness in fuzzy lattices
(Işık University Press, 2026-05-01)In this paper, we introduce the concept of fuzzy general disjointness property along with its notation. Our results indicate that a fuzzy section semi-complemented lattice possesses the fuzzy atomic covering property if ... -
Path center of a fuzzy graph based on µ-distance
(Işık University Press, 2026-05-01)Graph theory has put forward a mathematical foundation for modelling and fine tuning communication and transportation networks. Centers and path centers serve as effective tools for optimizing traffic flow and efficiently ... -
Hybrid bi-ideals and hybrid quasi-ideals in ordered semirings
(Işık University Press, 2026-05-01)Fuzzy set theory has been proven to be a powerful tool for dealing with uncertainty in decision-making processes. This theory addresses uncertain parameters. Soft set theory is another mathematical concept used for managing ... -
On a distinct family of iterative schemes for weak contractions
(Işık University Press, 2026-05-01)This article introduces a distinct collection of fixed point iteration schemes. For this collection, a strong convergence result is established involving weak contractions. Additionally, a comparison result is obtained to ... -
Generalized solutions for time ψ-fractional wave equation
(Işık University Press, 2026-05-01)This paper focuses on the fractional wave problem with the use of a new fractional derivative in Colombeau algebra. Using Banach’s fixed point theorem and Laplace transforms, we give and prove the integral solution of the ... -
Adjusted explained variation measure for zero-inflated poisson regression model
(Işık University Press, 2026-05-01)Explained variation measures are very popular in regression models. They explain the amount of variation in the dependent variable by the explanatory variables. In some situations, a small sample size is available in ...
