Special Session 131 Recent progress on singularities formations of some evolution partial differential equations
Organizer(s): Mohamed Ali , Nejla , Hatem
   Jean-Pierre Eckmann (University of Geneva, Switzerland)
 Nonlinear wave equations in Cosmology: Some results, but mostly open problems

Special Session 105 Nonlinear Differential Problems on Flat and Curved Structures: Variational and Topological Methods
Organizer(s): Giuseppina , Alexandru , Patrick 		Capital Suite 8
 13:30-14:00  Jean-Pierre Eckmann (University of Geneva, Switzerland)
 Tumbling Downhill along a Given Curve