GPH – International Journal of Mathematics (E-ISSN: 3050-9645), Volume 9, Issue 4 (April 2026) presents a rigorously peer-reviewed collection of scholarly articles contributing to contemporary developments in pure and applied mathematics. The published research emphasizes theoretical advancement, analytical rigor, computational methods, and interdisciplinary applications across areas including algebra, analysis, geometry, statistics, and mathematical modeling.

This issue supports high-quality mathematical scholarship, scientific innovation, and global academic exchange while maintaining strong editorial standards, ethical publishing practices, and open-access dissemination.