• On a regularized solution of the cauchy problem for matrix factorizations of the Helmholtz equation 

  Juraev, Davron Aslonqulovich; Noeiaghdam, Samad; Agarwal, Praveen (Işık University Press, 2023-10-01)

  In this paper, we consider the problem of recovering solutions for matrix factorizations of the Helmholtz equation in a multidimensional bounded domain from their values on a part of the boundary of this domain, i.e., the ...

• Investigation of the Conjugate gradient methods in solving the unconstrained nonlinear optimization problem and its applications 

  Shakir, Amel Nashat; Taha, Forat Mohammed (Işık University Press, 2026-03-01)

  In this paper, we consider various types of methods such as; Newton, QuasiNewton, Conjugate gradient, Trust region algorithm and etc. to solve an unconstrained nonlinear optimization problem. in most practical applications, ...

• Newly developed single-step block method for numerical solution of fourth order ordinary differential equations 

  Adebiyi, Adebayo Femi; Udoye, Adaobi Mmachukwu; Akinola, Lukman Shina; Mathew, David Adeleke (Işık University Press, 2026-03-01)

  This paper focuses on the development of a new block method for solving fourth order initial value problems of ordinary differential equations. Applying Chebyshev polynomial as a basis function, the method was developed ...

• Inverse and connected domination in Hypertree Networks 

  Shalini, V.; Rajasingh, Indra (Işık University Press, 2026-03-01)

  A dominating set of a graph G = (V, E) is a subset D of vertices such that every vertex in V \ D is adjacent to at least one vertex in D, and the minimum size of such a set is called the domination number denoted by γ(G). ...

• Injective coloring of central graphs 

  Mirdamad, Shahrzad Sadat; Mojdeh, Doost Ali (Işık University Press, 2026-03-01)

  For a given graph G = (V (G), E(G)), researchers have introduced different colorings based on the distances of the vertices. An injective coloring of a graph G is an assignment of colors to the vertices of G such that no ...

• Existence and uniqueness results for the bending elastic beam equations 

  Jonnalagadda, Jagan Mohan; Chakraverti, Sukriti; Jain, Vanshika (Işık University Press, 2026-03-01)

  We examine the existence and uniqueness of solutions to a particular class of two-point boundary value problems involving fourth-order ordinary differential equations. These problems have fascinating applications in the ...

• On separation properties in soft topological spaces 

  Hamouda, Essam H. (Işık University Press, 2026-03-01)

  In this paper, we explore separation axioms Ti, for i = 0, 1, 2, within the framework of soft topological spaces, utilizing the concept of soft points as defined in [16]. We define T0 and T1 in terms of the mapping τF and ...

• Bernstein-type inequalities for complex polynomials 

  Shamoradi, Mahboobeh; Bidkham, Mahmood (Işık University Press, 2026-03-01)

  Considering a class of polynomials G(z) = anzⁿ + Σnv=t an−vzⁿ⁻ᵛ, 1 ≤ t ≤ n having all it’s zeros in the disk |z| ≤ k, k ≤ 1, we present a generalization and improvement of results by Malik and Vong[8]. Also a variety of ...

• Existence of periodic solutions for first order impulsive differential equations with a deviating argument 

  Benhammou, Samir; Moutaouekkil, Loubna (Işık University Press, 2026-03-01)

  In this paper, we study the existence of periodic solutions for a kind of first-order impulsive differential equation with a deviating argument by using Mawhin’s continuation theorem. Meanwhile, we give an exampleto ...

• Partial controllability of semilinear systems 

  Bashirov, Agamirza E. (Işık University Press, 2026-03-01)

  The paper considers semilinear control system in the product of Hilbert spaces X = H × G driven by densely defined closed linear operator A generating a strongly continuous semigroup. For the linear operator L, projecting ...

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