Volume 2, Issue 3, December 2025

Preface: A special issue in honor of Professor Hari Mohan Srivastava’s 85th birthday at Optimization Eruditorum

Debdas Ghosh, Bidu Bhusan Jena, Susanta Kumar Paikray, Jen-Chih Yao & Yong Zhao | Page: i–i

Gradient-free methods for nonsmooth nonconvex multiobjective optimization

Yong Zhao, Chun-Lin You & Wang Chen | Pages: 157–164

Waste collection problem: mathematical model and solution method

Pinar Sentuna, Basak Izmirli, Melis Alpaslan Takan & Refail Kasimbeyli | Pages: 165–183

A two-step inertial method with a new step-size rule for quasimonotone variational inequalities in Hilbert spaces

Jian-Wen Peng, Jun-Jie Luo & Abubakar Adamu | Pages: 184–199

Design and characterization of optimal dual frames under Hilbert-Schmidt norm

Shankhadeep Mondal & R. N. Mohapatra | Pages: 200–212

Iterative algorithm for a common solution of equilibrium and fixed point problems for a finite family of multivalued enriched nonexpansive mappings in Hadamard spaces

Ma’aruf Shehu Minjibir, Jamilu Adamu Musa & Sani Salisu | Pages: 213–237