TY - JOUR TI - Generalized variational principles for the modified Benjamin-Bona-Mahony equation in the fractal space AU - Cao Xiao-Qun AU - Xie Si-Hang AU - Leng Hong-Ze AU - Tian Wen-Long AU - Yao Jia-Le JN - Thermal Science PY - 2024 VL - 28 IS - 3 SP - 2341 EP - 2349 PT - Article AB - Because variational principles are very important for some methods to get the numerical or exact solutions, it is very important to seek explicit variational formulations for the non-linear PDE. At first, this paper describes the modified Benjamin-Bona-Mahony equation in fractal porous media or with irregular boundaries. Then, by designing skillfully the trial-Lagrange functional, variational principles are successfully established for the modified Benjamin-Bona-Mahony equation in the fractal space, respectively. Furthermore, the obtained variational principles are proved correct by minimizing the functionals with the calculus of variations.