学术报告（张世清 2026.1.13）

摘要：The N-body problem with Newtonian potential is a classical problem, which is related with the motions of the N bodies under the universal gravitational forces of all the bodies. Because the potential may have singularities, and the Lagrangian action can be finite on collision generalized solutions for Newtonian-type weak force potentials, it is difficult to find classical non-collision periodic solutions by using variational methods. 
In this talk, I will talk about how to use variational methods to find classical non-collision periodic solutions.