orientable manifold造句

例句与造句

1. Smooth structures on an orientable manifold are usually counted modulo orientation-preserving smooth homeomorphisms.
2. On non-orientable manifolds, one may instead define the weaker notion of a density.
3. This is an orientable manifold with boundary, upon which " surgery " will be performed.
4. The singular homology and cohomology groups of a closed, orientable manifold are related by Poincar?duality.
5. A manifold is orientable if it has a consistent choice of connected orientable manifold has exactly two different possible orientations.
6. It's difficult to find orientable manifold in a sentence. 用orientable manifold造句挺难的
7. A true non-orientable manifold has " closed paths " that take travelers from R to / .
8. The most familiar example is orientability : some manifolds are orientable, some are not, and orientable manifolds admit 2 orientations.
9. See also orientable manifold ( the article may be a bit advanced, but it formally pinpoints some of the above observations ).
10. An orientable manifold has infinitely many volume forms, since multiplying a volume form by a non-vanishing function yields another volume form.
11. Both bundles are 2-manifolds, but the annulus is an orientable manifold while the M鯾ius band is a non-orientable manifold.
12. Both bundles are 2-manifolds, but the annulus is an orientable manifold while the M鯾ius band is a non-orientable manifold.
13. The Desargues graph can be embedded as a self-regular map in the non-orientable manifold of genus 6, with decagonal faces.
14. The cohomology with local coefficients in the module corresponding to the orientation covering can be used to formulate Poincar?duality for non-orientable manifolds : see Twisted Poincar?duality.
15. The 5-regular Clebsch graph can be embedded as a regular map in the orientable manifold of genus 5, forming pentagonal faces; and in the non-orientable surface of genus 6, forming tetragonal faces.
16. Every closed 3-manifold has a prime decomposition : this means it is the connected sum of prime 3-manifolds ( this decomposition is essentially unique except for a small problem in the case of non-orientable manifolds ).
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