DSpace@Çankaya

Yazar "Uğurlu, Ekin" için Fen - Edebiyat Fakültesi listeleme

Yazar "Uğurlu, Ekin" için Fen - Edebiyat Fakültesi listeleme

Sırala: Sıra: Sonuçlar:

  • On Dirichlet-integrable solutions of left-definite Hamiltonian systems 
    Uğurlu, Ekin; Bairamov, Elgiz (2023-07)
    This paper aims to share a method to handle left-definite Hamiltonian systems and to construct nested-ellipsoids related with the corresponding hermitian forms. We share a lower bound for the number of linearly independent ...
  • On quantum star graphs with eigenparameter dependent vertex conditions 
    Mutlu, Gökhan; Uğurlu, Ekin (2023-08)
    We investigate the spectral properties of two different boundary value problems on a compact star graph in which the vertex conditions are dependent on the spectral parameter. We treat these boundary value problems as ...
  • On Singular Fifth-Order Boundary Value Problems With Deficiency Indices (5,5) 
    Uğurlu, Ekin; Taş, Kenan (2022)
    This paper is devoted to introduce a way of construction of the well-defined boundary conditions for the solutions of a singular fifth-order equation with deficiency indices (5, 5). Imposing suitable separated and coupled ...
  • On some even-sequential fractional boundary-value problems 
    Uğurlu, Ekin (2024-02)
    In this paper we provide a way to handle some symmetric fractional boundary-value problems. Indeed, first, we consider some system of fractional equations. We introduce the existence and uniqueness of solutions of the ...
  • On some fractional operators generated from Abel’s formula 
    Uğurlu, Ekin (2022)
    This work aims to share some fractional integrals and derivatives containing three real parameters. The main tool to introduce such operators is the corresponding Abel’s equation. Solvability conditions for the Abel’s ...
  • On square integrable solutions of a fractional differential equation 
    Uğurlu, Ekin; Baleanu, Dumitru; Taş, Kenan (Elsevier Science Bv, 2018-11-15)
    In this paper we construct the Weyl-Titchmarsh theory for the fractional Sturm-Liouville equation. For this purpose we used the Caputo and Riemann-Liouville fractional operators having the order is between zero and one.
  • On the characteristic functions and Dirchlet-integrable solutions of singular left-definite Hamiltonian systems 
    Bairamov, Elgiz; Taş, Kenan; Uğurlu, Ekin (2024)
    In this work, a singular left-definite Hamiltonian system is considered and the characteristic-matrix theory for this Hamiltonian system is constructed. Using the results of this theory we introduce a lower bound for the ...
  • On the eigenvalues of second-order boundary-value problems 
    Uğurlu, Ekin (2020-10)
    In this paper we investigate the properties of eigenvalues of some boundary-value problems generated by second-order Sturm-Liouville equation with distributional potentials and suitable boundary conditions. Moreover, we ...
  • On the Maximal Subspaces of Discrete Hamiltonian Systems 
    Uğurlu, Ekin; Bairamov, Elgiz (2024-05)
    In this paper, we consider a discrete Hamiltonian system on nonnegative integers, and using Sylvester’s inertia indices theory, we construct maximal subspaces on which the Hermitian form has a certain sign. After constructing ...
  • On the solutions of a fractional boundary value problem 
    Uğurlu, Ekin; Baleanu, Dumitru; Taş, Kenan (Scientific Technical Research Council Turkey-Tubitak, 2018)
    This paper is devoted to showing the existence and uniqueness of solution of a regular second-order nonlinear fractional differential equation subject to the ordinary boundary conditions. The Banach fixed point theorem is ...
  • On the solutions of a fractional boundary value problem 
    Uğurlu, Ekin; Baleanu, Dumitru; Taş, Kenan (Scientific Technical Research Council Turkey-Tubitak, 2018)
    This paper is devoted to showing the existence and uniqueness of solution of a regular second-order nonlinear fractional differential equation subject to the ordinary boundary conditions. The Banach fixed point theorem is ...
  • On the solutions of a fractional boundary value problem 
    Uğurlu, Ekin; Baleanu, Dumitru; Taş, Kenan (SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2018)
    This paper is devoted to showing the existence and uniqueness of solution of a regular second-order nonlinear fractional differential equation subject to the ordinary boundary conditions. The Banach fixed point theorem is ...
  • On the solutions of a fractional boundary value problem 
    Uğurlu, Ekin; Baleanu, Dumitru; Taş, Kenan (2018)
    This paper is devoted to showing the existence and uniqueness of solution of a regular second-order nonlinear fractional differential equation subject to the ordinary boundary conditions. The Banach fixed point theorem is ...
  • On the zeros of solutions of ordinary and fractional differential equations 
    Uğurlu, Ekin (2023-09-30)
    This paper is devoted to studying on the locations of zeros of related integral operators and the solutions of some ordinary and fractional differential equations. We generalize Sturm and Picone's theorems and Leighton and ...
  • Regular Fifth-OrderBoundary Value Problems 
    Uğurlu, Ekin (Springer, 2019-06-28)
    The main purpose of this paper is to introduce a method to handle some boundary value problems generated by fifth-order formally symmetric differential equation and separated, real-coupled and complex-coupled boundary ...
  • Regular fractional differential equations in the sobolev space 
    Uğurlu, Ekin; Baleanu, Dumitru; Taş, Kenan (Walter De Gruyter GMBH, 2017-06)
    In this paper regular fractional Sturm-Liouville boundary value problems are considered. In particular, new inner products are described in the Sobolev space and a symmetric operator is established in this space.
  • Regular fractional dissipative boundary value problems 
    Baleanu, Dumitru; Uğurlu, Ekin (Springer, 2016-07-01)
    In this manuscript we present a regular dissipative fractional operator associated with a fractional boundary value problem. In particular, we present two main dissipative boundary value problems and one of them contains ...
  • Regular third-order boundary value problems 
    Uğurlu, Ekin (Elsevier Science INC, 2019-02-15)
    In this paper, we consider some boundary value problems generated by third-order formally symmetric (self-adjoint) regular differential expression and separated, real-coupled and complex-coupled boundary conditions. It is ...
  • Scattering and characteristic functions of a dissipative operator generated by a system of equations 
    Bayram, Elgiz; Taş, Kenan; Uğurlu, Ekin (2021)
    In this paper, we consider a system of first-order equations with the same eigenvalue parameter together with dissipative boundary conditions. Applying Lax-Phillips scattering theory and Sz.-Nagy-Foiaş model operator theory ...
  • Scattering and spectral problems of the direct sum sturm-liouville operators 
    Allahverdiev, Bilender P.; Uğurlu, Ekin (Ministry Communications & High Technologies Republic Azerbaijan, 2017)
    In this paper a space of boundary values is constructed for direct sum minimal symmetric Sturm-Liouville operators and description of all maximal dissipative, maximal accumulative, selfadjoint and other extensions of such ...