On 3-submanifolds of S 3 which admit complete spanning curve systems
Yan Zhao , Fengchun Lei , Fengling Li
Chinese Annals of Mathematics, Series B ›› 2017, Vol. 38 ›› Issue (6) : 1373 -1380.
On 3-submanifolds of S 3 which admit complete spanning curve systems
Let M be a compact connected 3-submanifold of the 3-sphere S 3 with one boundary component F such that there exists a collection of n pairwise disjoint connected orientable surfaces S = {S 1, · · ·, S n} properly embedded in M, ∂S = {∂S 1, · · ·, ∂S n} is a complete curve system on F. We call S a complete surface system for M, and ∂S a complete spanning curve system for M. In the present paper, the authors show that the equivalent classes of complete spanning curve systems for M are unique, that is, any complete spanning curve system for M is equivalent to ∂S. As an application of the result, it is shown that the image of the natural homomorphism from the mapping class group M(M) to M(F) is a subgroup of the handlebody subgroup H n.
Complete surface system / Complete spanning curve system / Heegaard diagram / Handlebody addition
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