By Laura Starkston
By Stéphane Guillermou
By Sobhan Seyfaddini
Appears in collection : Colloque Scientifique International Poincaré 100
Poincare's paper « Sur un théorème de géométrie », written shortly before his death,started a development which eventually led to creation of a new field of symplectic topology. In the talk I will highlight some milestones of this process.