1. On the Linear Stability of a Vortex Pair Equilibrium on a Riemann Surface of Genus Zero

   • Adriano Regis Rodrigues
   • César Castilho
   • Jair Koiller

   OriginalPaper 03 October 2022 Pages: 493 - 524

   

2. On Some Invariants of Birkhoff Billiards Under Conjugacy

   • Comlan E. Koudjinan
   • Vadim Kaloshin

   OriginalPaper 03 October 2022 Pages: 525 - 537

   

3. Normal Forms for Hamiltonian Systems in Some Nilpotent Cases

   • Kenneth R. Meyer
   • Dieter S. Schmidt

   OriginalPaper 03 October 2022 Pages: 538 - 560

   

4. More on Superintegrable Models on Spaces of Constant Curvature

   • Cezary Gonera
   • Joanna Gonera
   • Bartosz M. Zawora

   OriginalPaper 03 October 2022 Pages: 561 - 571

5. Degenerate Resonances and Synchronization in Nearly Hamiltonian Systems Under Quasi-periodic Perturbations

   • Albert D. Morozov
   • Kirill E. Morozov

   OriginalPaper 03 October 2022 Pages: 572 - 585