Maximal tori in the contactomorphism groups of circle bundles over Hirzebruch surfaces
Maximal tori in the contactomorphism groups of circle bundles over Hirzebruch surfaces
复制标题
Hirzebruch 表面上圆束接触同像群中的最大环面
DOI:
10.4310/mrl.2003.v10.n1.a13
复制
发表时间:
2002
影响因子:
1
通讯作者:
E. Lerman
中科院分区:
文献类型:
--
作者:
E. Lerman
In a recent preprint Yael Karshon showed that there exist non-conjugate tori in a group of symplectomorphisms of a Hirzebruch surface. She counted them in terms of the cohomology class of the symplectic structure. We show that a similar phenomenon exists in the contactomorphism groups of pre-quantum circle bundles over Hirzebruch surfaces. Note that the contact structures in question are fillable. This may be contrasted with an earlier paper where we showed that there are infinitely many non-conjugate tori in the contactomorphism groups of certain overtwisted lens spaces (Contact cuts, Israel J. Math, 124(2001), 77--92).