例句與造句

1. Let \ textstyle \ alpha, \ beta be open finite covers of \ textstyle X.
2. A 3-manifold which has such a finite cover is said to "'virtually fiber " '.
3. That is, it has a finite cover ( a covering space with a finite-to-one covering map ) that is a Haken manifold.
4. Since C _ 0 ?" S is compact and ( U _ n ) is an open cover of it, we can extract a finite cover.
5. The join of \ textstyle \ alpha and \ textstyle \ beta is the open finite cover by all sets of the form \ textstyle A \ cap B where \ textstyle A \ in \ alpha, \ textstyle B \ in \ beta.
6. It's difficult to find finite cover in a sentence. 用finite cover造句挺難的
7. An open finite cover \ textstyle \ beta refines \ textstyle \ alpha, denoted \ textstyle \ beta \ succ \ alpha, if for every \ textstyle V \ in \ beta, there is \ textstyle U \ in \ alpha so that \ textstyle V \ subset U.
8. Then at least one of the 2 " n " sections of " T " 0 must require an infinite subcover of " C ", otherwise " C " itself would have a finite subcover, by uniting together the finite covers of the sections.