A non-displacable Lagrangian torus in T^*S^2
  We show that the Lagrangian torus in the cotangent bundles of the 2-sphere obtained by applying the geodesic flow to the unit circle in a fibre is not displaceable by computing its Lagrangian Floer homology. The computation is based on a symmetry argument. 
Peter Albers and Urs Frauenfelder