1. Monotonicity and symmetry of solutions of elliptic systems in general domains

   • Djairo G. De Figueredo

   OriginalPaper Pages: 119 - 123

2. On the existence of branches of time-periodic solutions to the nonlinear vibrating string equations

   • Hugo Beirão Da Veiga

   OriginalPaper Pages: 125 - 148

3. A note on the existence of multiple homoclinic orbits for a perturbed radial potential

   • Kazunaga Tanaka

   OriginalPaper Pages: 149 - 162

4. Multiple solutions of boundary value problems: an elementary approach via the shooting method

   • Gheorghe Dinca
   • Luis Sanchez

   OriginalPaper Pages: 163 - 178

5. Periodic motions of conservative systems with singular potentials

   • Antonio Ambrosetti
   • Michael Struwe

   OriginalPaper Pages: 179 - 202