1. Arithmetics of binary quadratic forms, symmetry of their continued fractions and geometry of their de Sitter world

   • V. Arnold

   Original Paper Pages: 1 - 42

2. Sommerfeld condition for a Liouville equation and concentration of trajectories

   • Benoît Perthame
   • Luis Vega

   Original Paper Pages: 43 - 57

3. The convexity principle and its applications

   • B. T. Polyak

   Original Paper Pages: 59 - 75

4. Cycles and Spectra

   • H. Blaine Lawson Jr.

   Original Paper Pages: 77 - 105

5. Some recent methods for partial differential equations of divergence form

   • Gui-Qiang Chen

   Original Paper Pages: 107 - 144

6. Bounds on leaves of one-dimensional foliations

   • E. Esteves
   • S. Kleiman

   Original Paper Pages: 145 - 169

7. Quasiperiodic functions and dynamical systems in quantum solid state physics

   • A. Ya. Maltsev
   • S. P. Novikov

   Original Paper Pages: 171 - 210