This mathematician names a homology sphere which results from +1 surgery on the right-handed trefoil knot.
This mathematician names the group of Minkowski spacetime isometries, and in dynamical systems, he names the intersection of a periodic orbit with a lower-dimensional subspace also named for him. This mathematician names a homology sphere which results from +1 surgery on the right-handed trefoil knot. This man received a prize from the King of Sweden for his work on the three-body problem, though he did not solve it. This man names a theorem asserting that every simply connected closed   3-manifold is homeomorphic to the 3-sphere, the only solved Millenium Problem. For ten points, identify this French mathematician whose namesake conjecture was proven by Grigori Perelman.
This mathematician names the group of Minkowski spacetime isometries, and in dynamical systems, he names the intersection of a periodic orbit with a lower-dimensional subspace also named for him.
Jules Henri Poincaré