Ullah, H. ., Salim Khan, M. ., Shah, Z. ., Fălădău, M. A. ., Fatima, N. ., Sarwar, M. ., & Abodayeh, K. . (2026). Finite Element Multigrid Simulation of Natural Convection in Hybrid Nanofluids Within Isolated Cavity for Solar Energy Systems: A Machine Learning-Levenberg-Marquardt Approach. Contemporary Mathematics, 7(2), 2030–2050. https://doi.org/10.37256/cm.7220269157