• On the Chebyshev polynomial coefficient problem of bi-Bazilevi? functions 

  Altınkaya, Şahsene; Yalçın, Sibel (Işık University Press, 2020)

  A function said to be bi-Bazilevi? in the open unit disk U if both the function and its inverse are Bazilevi? there. In this paper, we will study a newly constructed class of bi-Bazilevi? functions. Furthermore, we establish ...

• Bishop’s property (?) and weighted conditional type operators in k-quasi class A*n 

  Azimi, Mohammad Reza; Akbarbaglu, İbrahim; Abedi, Fahimeh (Işık University Press, 2020)

  An operator T is said to be k-quasi class A*n operator if T*? (|T??¹|²/??¹? |T*|² ) T? ? 0, for some positive integers n and k. In this paper, we prove that the k-quasi class A*n operators have Bishop, s property (?). Then, ...

• Further results of neutrosophic subalgebras in BCK/BCI-algebras based on neutrosophic points 

  Jun, Young Bae; Muhiuddin, Ghulam (Işık University Press, 2020)

  In this paper, we investigate several properties of (?, ? ?q(kT ,kI ,kF ))-neutrosophic subalgebra, (?, q(kT ,kI ,kF ))-neutrosophic subalgebra, (q(kT ,kI ,kF ), ? ?q(kT ,kI ,kF ))-neutrosophic subalgebra, and (q(kT ,kI ...

• Approximation of periodic functions by sub-matrix means of their fourier series 

  Krasniqi, Xhevat Zahir (Işık University Press, 2020)

  Some results on approximation of periodic functions are extended in two directions: Improving the degree of approximation of periodic functions by sub-matrix means of its Fourier series and such degree is applicable for a ...

• A pre-subadditive fuzzy measure model and its theoretical interpretation 

  Ünver, Mehmet; Özçelik, Gökhan; Olgun, Murat (Işık University Press, 2020)

  In this paper a particular set function which depends on densities of singletons with interdependence coefficients and which provides redundancy among singletons is considered. The Möbius representation of this function ...

• Lucas polynomial solution for neutral differential equations with proportional delays 

  Gümgüm, Sevin; Baykuş Savaşaneril, Nurcan; Kürkçü, Ömür Kıvanç; Sezer, Mehmet (Işık University Press, 2020)

  This paper proposes a combined operational matrix approach based on Lucas and Taylor polynomials for the solution of neutral type differential equations with proportional delays. The advantage of the proposed method is the ...

• A fixed point problem via simulation functions in incomplete metric spaces with its application 

  Lashkaripour, Rahmatollah; Baghani, Hamid; Ahmadi, Zahra (Işık University Press, 2020)

  In this paper, firstly, we review the notion of the SO-complete metric spaces. This notion let us to consider some fixed point theorems for single-valued mappings in incomplete metric spaces. Secondly, as motivated by the ...

• A note on certain topological indices of the derived graphs of subdivision graphs 

  Basavanagoud, Bommanahal; Gali, Chetana S. (Işık University Press, 2020)

  In this note, we correct some errors in S. M. Hosamani et al. [TWMS J. App. Eng. Math., 6(2), (2016) pp. 324–332]. The derived graph [G]† of a graph G is the graph having the same vertex set as G, with two vertices of ...

• Linear combinations of q-starlike functions of order alpha 

  Shamsan, Hamid; Qahtan, Read Saleh; Latha Satyanarayana (Işık University Press, 2020)

  In this paper, we introduced a new concept of bounded radius rotation to define the class of q-starlike functions of order ? using the q-derivative, some geometric properties of linear combination of such functions are studied.

• ?-Best proximity point theorems in metric spaces with applications in partial metric spaces 

  Imdad, Mohammad; Saleh, Hayel Nasr; Alfaqih, Waleed Mohammad (Işık University Press, 2020)

  In this paper, we introduce the notions of (F, ?, ?)-proximal contraction and (F, ?, ?)-weak proximal contraction for non-self mappings and utilize the same to prove some existence and uniqueness of ?-best proximity point ...

• Backscattering from soft-hard triangular cylinder: primary PTD approximation 

  Hacıvelioğlu, Feray (Işık University Press, 2020)

  High-frequency diffraction from isosceles triangular cylinders with two faces soft and one face hard is investigated for backscattering case and novel first-order physical theory of diffraction asymptotics are derived. ...

• Edge domination in some brick product graphs 

  Kumar, U. Vijaya Chandra; Murali, R.; Girisha, A. (Işık University Press, 2020)

  Let G = (V, E) be a simple connected and undirected graph. A set F of edges in G is called an edge dominating set if every edge e in E ? F is adjacent to at least one edge in F. The edge domination number ?? (G) of G is ...

• Global attractor of the hyperbolic relaxation of the Swift-Hohenberg equation in R? 

  Yayla, Sema (Işık University Press, 2020)

  In this paper, the hyperbolic modification of the Swift-Hohenberg equation in R? is dealt with. The existence of the global attractor in H² (R?)×L² (R?) is proved. Also, the smoothness and the finite dimensionality of the ...

• Comparison of integro quadratic and quartic spline interpolation 

  Haghighi, Ahmadreza; Aghazadeh, Arezu; Abedini, Ayub (Işık University Press, 2020)

  In this paper quadratic and quartic B-splines were used for reconstruction of an approximating function, where the integral values of successive subintervals were used instead of function values at the knots. After introducing ...

• Fuzzy soft quasi separation axioms 

  Demirtaş Tozlu, Naime; Yüksel, Şaziye; Dizman Şimşekler, Tuğba Han (Işık University Press, 2020)

  In this work, we focus on fuzzy soft quasi separation axioms and give some new results about the concept of quasi coincidence with fuzzy soft sets defined in [17]. Further, we give relations between fuzzy soft quasi T??(i ...

• Addition theorem and certain properties of k-bessel function 

  Gehlot, Kuldeep; Purohit, Sunil Dutt; Sharma, Jankiballabh (Işık University Press, 2020)

  Our purpose in this paper is to study certain basic properties of k-Bessel function, introduced by Gehlot [Nonl. Anal. Diff. Eq., 2(2)(2014), 61-67]. In this regard, we obtain addition theorem, expansions formula, integral ...

• Inequalities via strongly (p, h)-harmonic convex functions 

  Noor, Muhammad Aslam; Noor, Khalida Inayat; Iftikhar, Sabah (Işık University Press, 2020)

  The main aim of this paper is to consider a new class of harmonic convex functions with respect to an arbitrary non-negative function, which is called strongly (p, h)-harmonic convex function. We establish Hermite-Hadamard ...

• Wavelet packets in weighted Sobolev space 

  Kumar, Raj; Chauhan, Manish (Işık University Press, 2020)

  We perform some splitting tricks over wavelets to construct basic wavelet packets in weighted Sobolev space. MRA based wavelet packet functions and their orthogonality at different levels in weighted Sobolev space are ...

• Linear optimization method on single valued neutrosophic set and its sensitivity analysis 

  Deli, İrfan (Işık University Press, 2020)

  Recently, decision making problems has prompted extensive awareness, especially multi-attribute decision-making problem in single valued neutrosophic sets. Given the inherent characteristics of this case, a multi-attribute ...

• Fixed point results from soft metric spaces and soft quasi metric spaces to soft G-metric spaces 

  Bilgili Güngör, Nurcan (Işık University Press, 2020)

  In this paper, soft quasi-metric spaces by means of soft elements are described. Also the presentation of soft G-metric spaces and the existing fixed point results of contractive mappings defined on this kind of spaces are ...

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