1. Periodic orbits of an electric charge in a magnetic dipole field

   • Lidia Jiménez-Lara
   • Eduardo Piña

   OriginalPaper Pages: 327 - 345

2. Secular perturbation theory and computation of asteroid proper elements

   • Andrea Milani
   • Zoran Knežević

   OriginalPaper Pages: 347 - 411

3. The N-gon is not a local minimum of U ² I for N > 7

   • Kevin D. P. Woerner

   OriginalPaper Pages: 413 - 421