Mathematical Inequalities & Applications · Volume 4, Issue 1 Sundman's inequalities in N-body problems and their applications 04-07 Pages 85-91 DOI 10.7153/mia-04-07 Downloads Short PDF Full PDF PNG Authors Zhang Shiqing Keywords N-body problems period energy angular momentum the momentum of inertia Subject classes 34C25 34C15 58Fxx 70F10