aspherical manifold造句

例句与造句

1. However, there do exist symplectically aspherical manifolds which are not aspherical spaces.
2. By Stokes'theorem, we see that symplectic manifolds which are aspherical are also symplectically aspherical manifolds.
3. Since aspherical manifolds with isomorphic fundamental groups are homotopy equivalent, the Borel conjecture implies that aspherical closed manifolds are determined, up to homeomorphism, by their fundamental groups.
4. The Borel conjecture is a topological reformulation of Mostow rigidity, weakening the hypothesis from hyperbolic manifolds to aspherical manifolds, and similarly weakening the conclusion from an isometry to a homeomorphism.
5. The Weinstein conjecture was first proved for contact hypersurfaces in \ mathbb R ^ { 2n } in 1986 by Viterbo, then extended to cotangent bundles by Hofer-Viterbo and to wider classes of aspherical manifolds by Floer-Hofer-Viterbo.
6. It's difficult to find aspherical manifold in a sentence. 用aspherical manifold造句挺难的
7. More generally, the injectivity part of the Baum Connes conjecture for a group " G ", which is known in many cases, would imply that a closed aspherical manifold with fundamental group " G " has no metric with positive scalar curvature.