Example image of eyePlorer eyePlorer map for 'Generalized Poincaré conjecture': Homotopy sphere Manifold Mathematics Sphere Topology Category (mathematics) Differentiable manifold Piecewise linear manifold Topological manifold Homotopy Poincaré conjecture Simply connected space Fields Medal Grigori Perelman John Milnor Michael Freedman Stephen Smale Differential topology John R. Stallings Erik Christopher Zeeman Max Newman Differential structure Exotic sphere Michel Kervaire Orientability Mazur manifold H-cobordism Geometric topology Exotic R4 Classification of manifolds Surgery exact sequence