论文标题
拉紧叶叶叶覆盖s^2
Taut foliations leafwise branch cover S^2
论文作者
论文摘要
当且仅当图形从m到2个球体的映射时，其限制每个叶子是分支的盖子时，一个方向的3个manifold m的共同叶面f就会拉紧。
A co-oriented foliation F of an oriented 3-manifold M is taut if and only if there is a map from M to the 2-sphere whose restriction to every leaf is a branched cover.
