1. The periodic orbits of an area preserving twist map

   • S. B. Angenent

   OriginalPaper Pages: 353 - 374

2. Recursion operators and bi-Hamiltonian structures in multidimensions. I

   • P. M. Santini
   • A. S. Fokas

   OriginalPaper Pages: 375 - 419

3. A general relation between kink-exchange and kink-rotation

   • Rafael D. Sorkin

   OriginalPaper Pages: 421 - 434

4. The Beltrami spectrum for incompressible fluid flows

   • Peter Constantin
   • Andrew Majda

   OriginalPaper Pages: 435 - 456

5. NijenhuisG-manifolds and Lenard bicomplexes: A new approach to KP systems

   • F. Magri
   • C. Morosi
   • G. Tondo

   OriginalPaper Pages: 457 - 475

6. Valence bond ground states in isotropic quantum antiferromagnets

   • Ian Affleck
   • Tom Kennedy
   • Hal Tasaki

   OriginalPaper Pages: 477 - 528