• Adaptive boosted estimation for single-index quantile regression 

  Alshaybawee, Taha; Alhusseini, Fadel Hamid Hadi; Mzedawee, Asaad Naser Hussein (Işık University Press, 2025-10-01)

  We propose a novel boosted estimation method for single-index quantile regression (SIQR) that combines the robustness of quantile regression with the flexibility of gradient boosting. By modeling the conditional quantile ...

• Signed sum cordial labeling of graphs 

  Daisy, K. Jeya; Paulson, P. Princy; Jeyanthi, Pon (Işık University Press, 2025-10-01)

  The notion of signed product cordial labeling was introduced in 2011 and further studied by several researchers. Inspired by this notion, we define a new concept namely signed sum cordial labeling as follows: A vertex ...

• Normality and regularity of Pythagorean fuzzy cellular spaces 

  Gnanachristy, N. B.; Revathi, Govindasamy Krishnamoorthy; Obeng-Denteh, William (Işık University Press, 2025-10-01)

  Normality and regularity are key separation axioms that helps to classify and understand the structure of topological spaces. This research article investigates the properties of normality and regularity within the context ...

• On the fundamental theorems of (α, β)-Pythagorean fuzzy ideals of rings 

  Bhunia,Supriya; Ghorai, Ganesh (Işık University Press, 2025-10-01)

  An (α, β)-Pythagorean fuzzy set is a modern approach to handling ambiguity. This article represents the perception of an (α, β)-Pythagorean fuzzy coset of any (α, β)-Pythagorean fuzzy ideal of rings. We demonstrate several ...

• Equitable dominator coloring of graphs 

  George, Phebe Sarah; Madhumitha, S.; Sudev, Naduvath K. (Işık University Press, 2025-10-01)

  This paper introduces a variant of domination-related coloring of graphs, called the equitable dominator coloring of graphs, which is a combination of equitable coloring and dominator coloring of graphs. The minimum number ...

• The hybrid form of the hyperbolic Horadam matrix functions 

  Mersin, Efruz Özlem (Işık University Press, 2025-10-01)

  In the present paper, a special type of hybrid number is introduced whose components are the hyperbolic Horadam sine and cosine matrix functions. These hybrid numbers and their symmetrical forms are explored in detail, and ...

• Systems bifurcation of limit cycles for a family of discontinuous piecewise isochronous differential systems separated by irregular line 

  Barkat, Meriem; Benterki, Rebiha; Baymout, Louiza (Işık University Press, 2025-10-01)

  The study of Hilbert’s 16th problem for piecewise linear differential systems has received significant attention from many researchers. It was shown that the upper bound for the maximum number of limit cycles can vary ...

• Existence, uniqueness, and stability of solutions for nonlinear fractional integro-differential equations with nonlocal boundary conditions and fractional derivatives 

  Abou Omar, Mirvet; Awad, Yahia Abdul Rahman; Mghames, Ragheb Hatem; Amin, Karim Mohammad (Işık University Press, 2025-10-01)

  This study investigates a nonlinear fractional integro-differential equation defined by Riemann-Liouville fractional derivatives, focusing on the existence, uniqueness, and stability of its solutions. Using advanced ...

• Paired domination integrity of derived graphs of cycles 

  Antony, Annie Clare; Shathish, Sangeetha (Işık University Press, 2025-10-01)

  The study of the vulnerability of real-life networks helps network designers construct networks such that their stability is maintained even under the disruption of a few nodes or links connecting the nodes. In this paper, ...

• Fuzzy primely filters in BL-algebras 

  Abdullah Alqahtany, Manal; Dale, Tanisha Bhagwan (Işık University Press, 2025-10-01)

  This study introduces and rigorously examines the concept of fuzzy primely filters (FPYFs) in BL-algebras, marking a significant advancement in the field. The investigation extends beyond conceptualization to elucidate the ...

• Extensive exploration of multi-term hybrid functional equation vıa hybrid differential feedback control 

  El-Sayed, Ahmed Mohamad; Al-Issa, Shorouk Mahmoud; Hashem, Hind Hassan Gaber; Kaddoura, Issam H.; Najdi, Ali A. (Işık University Press, 2025-10-01)

  This paper investigates the existence of solutions for a multidimensional hybrid functional equation with multiple delays, incorporating differential feedback control. The focus is on finding well-defined, continuous, and ...

• An efficient eighth order family of iterative method for solving systems of nonlinear equations 

  Yaseen, Saima; Zafar, Fiza (Işık University Press, 2025-09-01)

  In this paper, we analyse the underlying computational cost as well as applicability of the new iterative methods for real-life problems and illustrate that the new schemes produce approximations of greater numerical ...

• A comparative study on prime and vertex k-prime labeling of one point union of path graphs 

  Santiago, Teresa Arockiamary; Vijayalakshmi, G. (Işık University Press, 2025-09-01)

  In our study, we investigate the structure of one point union of path graphs and prove that they admit a vertex k-prime labeling. Further a study on comparison between prime and vertex k-prime labeling for one point union ...

• Availability and reliability analysis of a two-unit parallel system subject to failure and repair operating in a multi-level environment 

  Thilaka, Balakrishnan; Hemanth Kumar, Sankaralingam; Swaminathan, Udayabaskaran (Işık University Press, 2025-09-01)

  In this paper, a two-unit parallel system is considered subject to failure and repair in a multi-level environment. It is assumed that there are N levels of the environment. The failure time of any operating unit in the ...

• On the generic Cut–Point detection procedure in the Binomial Group Testing 

  Čižikovienė, Ugnė; Skorniakov, Viktor (Işık University Press, 2025-09-01)

  Initially announced by Dorfman in 1943 for medical screening, (Binomial) Group Testing (BGT) was quickly recognized as a useful probabilistic tool in many other fields: quality control, communications and networking, ...

• On (p, q)-fuzzy subgroups 

  Sivadas, Aparna; Jacob John, Sunil; T.M., Athira (Işık University Press, 2025-09-01)

  The (p, q)-fuzzy sets, which extend the concept of q-rung orthopair fuzzysets, provide a broader framework for representing uncertainty. This article introduces the concept of (p, q)-fuzzy subgroups of finite groups and ...

• Extensive error derivative review of LSTM models with sign language interpretation 

  Kar, Harapriya; Perumal, Viswanathan (Işık University Press, 2025-09-01)

  LSTM models are essential for systems that translate sign language, where the model suffers from error loss when processing data. LSTMs reduce error propagation by continuously calculating gradients, unlike traditional ...

• A novel approach on m-polar fuzzy set with Dombi power aggregation operators to solve multi-attribute decision-making problems 

  Maity, Krishna Rani; Pal, Madhumangal (Işık University Press, 2025-09-01)

  This article introduces new aggregation operators by combining Dombi and power operators, resulting in m-polar fuzzy Dombi power averaging and geometric operators, with several key properties analyzed. A novel approach is ...

• Strong incidence domination index in fuzzy incidence graphs 

  R. Nair, Kavya; M.S., Sunitha (Işık University Press, 2025-09-01)

  This article introduces the concept of the domination index in fuzzy incidence graphs (FIGs) through the use of strong incidence domination. It explores several related notions, including fuzzy incidence irredundant set, ...

• Degree sum spectra and degree sum energy of certain families of graphs 

  G. Mirajkar, Keerthi; Naikar, Roopa S.; Parvathalu, Bolle (Işık University Press, 2025-09-01)

  For any simple graph G, the degree sum matrix is defined as a matrix in which each entry represents the sum of the degrees of a pair of vertices. The degree sum energy is the absolute sum of the eigenvalues of the degree ...

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