contractible वाक्य

उदाहरण वाक्य

1. Spaces that are homotopy equivalent to a point are called contractible.
2. Any fiber bundle over a contractible CW-complex is trivial.
3. Since is a fibration with contractible fibre, sections of exist.
4. Non-contractible in general have non-trivial de Rham cohomology.
5. Furthermore, every cone is contractible to the vertex point by the homotopy
6. For example, an open ball is a contractible manifold.
7. All manifolds homeomorphic to the ball are contractible, too.
8. In particular, the universal covering of such a space is contractible.
9. Every collapsible complex is contractible, but the converse is not true.
10. Since the half-plane is contractible, all bundle structures are trivial.