Vol. 23 No. 1 (2026): September 2026

Research Articles

• Fisrt Zagreb, Gutman, and Wiener Index of The Non-Coprime Graph for Dihedral Group

  Dimas Indrawadi, I Gede Adhitya Wisnu Wardhana, Hazzirah Izzati Hassim, Fariz Maulana

  1-6

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• Insurance Portfolio Valuation under Market Jumps: A Framework Combining Kou Jump-Diffusion Forecasting and Dynamic CPPI Hedging

  Andi Fitriawati, Sapto Wahyu Indratno, Kurnia Novita Sari, Werry Febrianti

  7-19

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• Significant Wave Height Forecasting in the Singapore Strait: Deep Learning Ensemble Stacking with ERA5-IDW Data

  Sandy Salomo Saruan, Gusti Ayu Dwi Yanti

  20-37

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• Exact Sequences in (R,S)-Modules

  Dian Ariesta Yuwaningsih, Yassin Dwi Cahyo, Nanda Subastian

  38-48

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• Homoderivations in Prime Near Rings

  Gusti Ayu Dwi Yanti, Sandy Salomo Saruan

  49-58

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• A Study of Multivariate Time Series Clustering Based on Vector Autoregressive with Exogenous Models for Forecasting Cooking Oil Prices in Indonesia

  Mawar Cahyanindri, Rohaeti Embay, Maya Widyastiti

  59-75

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• Edge Metric Dimension of Uniform Theta Graphs and Sunflower Graphs

  Muchammad Abrori, Deddy Rahmadi, Lailatul Ulla Safitri, Alvian Nur Rohman, Jaqueline Widad Zuha

  76-93

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• Application of Agglomerative Hierarchical Clustering Based on Rolling Horizon and Minimum Variance in IDX30 Stock Portfolio Optimization

  Khoirunnisa Puspa Negari, Ezra Putranda Setiawan

  94-110

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• Integrating Bibliometric Analysis Using VosViewer and Path Analysis to Model Farmer Loyalty

  Viky Iqbal Azizul Alim, Candra Rezzining Wulat Sariro Weni Utomo, Arifin Arifin, Firdha Mahrifatul Zana

  111-125

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• SEIR-SEI DENGUE TRANSMISSION DYNAMICS IN KUPANG CITY: STABILITY AND SENSITIVITY ANALYSIS

  Dhini Juniarti Putri, Ariyanto Aryanto, Mira Wadu, Maria Lobo

  126-135

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• A Comparative Analysis of the Accuracy of the Value at Risk Estimation Methods on Indonesian Banking Stocks

  Jusmawati Massalesse, Cindy Cindy

  136-146

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• Stability Analysis and Optimal Control of the SEIR-SI Model for the Spread of Dengue Hemorrhagic Fever with Treatment Control

  Rido Tarigan, Pardomuan Sitompul

  147-64

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• Application of the SARIMA Method for Forecasting Inflation in Malang City for the Period May-December 2026 Peramalan Inflasi Kota Malang Periode 2016 - 2026 Menggunakan Metode SARIMA

  SILMA ISTAFLAHA, Andi Daniah Pahrany, Muhammad Arief Nurohman

  165-179

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• Analysis of Pneumonia Transmission Dynamics in Under-Five Children Using an SEITR Model with Awareness and Vaccination

  Santa Falare Sitanggang, Tri Andri Hutapea

  180-194

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• Connectivity of Non-Coprime Graph over Dihedral Group

  Winda Cahya Dwi Wahyuni, Arif Munandar

  195-202

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• CO2 Emission Modeling in Asian Countries Using a Truncated Spline Nonparametric Regression Approach on Panel Data

  Dita Amelia, Anisah Nabilah Ghasani, Salsabilla Rusydah Putri

  203-214

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• L(3,1)-Labeling of Double-Quadrilateral Windmill And Flower Graphs

  Hafif Komarullah, Siti Zulfa Rosyidah, Rizqy Amalia Nurfadila, Mifdati Afifah

  215-221

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• Hopf Bifurcation in an S–I–P Dynamic Model with Disease in the Prey Population and Holling Type III Functional Response Bifurkasi Hopf pada Model Dinamik S-I-P

  GESTI ESSA WALDHANI WALDHANI

  222-235

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• Fuzzy Ideal and Fuzzy Filter on Ordered Groupoid

  Aminah Muliawati, Saman Abdurrahman, Thresye Thresye

  236-245

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• Spectral Energy-Based Adaptive Homomorphic Filtering for Astronomical Image Enhancement

  Ahmad Fawaid Ridwan, Iqbal Robiyana

  246-263

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