Soliton-M-lump wave formation and other interacting propagation for the nonlinear Geng equation Karmina K. Ali, Abdullahi Yusuf and Soheil Salahshour Eur. Phys. J. Plus, 140 6 (2025) 583 Published online: 24 June 2025 DOI: 10.1140/epjp/s13360-025-06513-8