Contributions to Mathematics (ISSN : 2709-3646)

Volume 12 (2025)

On the Remainder of a Rapidly Converging Series for the Catalan Constant
Shun-Wei Xu, Chao-Ping Chen
Pages:   1–7    |    DOI: 10.47443/cm.2025.061

Some Results on Triangular Coefficient Matrix Rings
Peter Danchev, Gholamreza Karamali, Hessam Hosseinnezhad, Omid Hasanzadeh
Pages:  8–16   |   DOI: 10.47443/cm.2025.071

On a Class of Extended Convex Functions and Their Integral Inequalities
Bo-Yan Xi, Feng Qi
Pages: 17–24   |   DOI: 10.47443/cm.2025.070

Even Facial 2-Colorings of Plane Graphs
Július Czap
Pages: 25–30   |   DOI: 10.47443/cm.2025.066

Exact Sequences of Direct Systems of Hypergroups
Sohrab Ostadhadi-Dehkordi, Mehri Heidari
Pages: 31–39    |   DOI: 10.47443/cm.2025.082

Two Exponential-Trigonometric Hardy-Hilbert-Type Integral Inequalities in the Whole Plane
Christophe Chesneau
Pages: 40–47   |   DOI: 10.47443/cm.2025.081

On Quasi-Tree Graphs Attaining the Three Largest Zagreb Spectral Radii
Youhang Zheng, Zhen Lin
Pages: 48–55   |   DOI: 10.47443/cm.2025.093

Certain Incomplete Sums of Reciprocals of the Binomial Coefficients
Necdet Batır
Pages: 56–63   |   DOI: 10.47443/cm.2025.092

On the Hyperbolic Sombor Index and Its Applications
Chengfang Li, Xiangyu Ren
Pages: 64–73   |   DOI: 10.47443/cm.2025.117

A New Convergence Method Based on Local Block Averages
Fatih Nuray
Pages: 74–81   |   DOI: 10.47443/cm.2025.100

Water Capacity of Random Functions
Aubrey Blecher, Arnold Knopfmacher
Pages: 82–88   |   DOI: 10.47443/cm.2025.097