Lagrangian unknottedness in Stein surfaces
Lagrangian unknottedness in Stein surfaces
复制标题
斯坦因表面的拉格朗日无结性
DOI:
10.4310/ajm.2012.v16.n1.a1
复制
发表时间:
2012
影响因子:
0.6
通讯作者:
R. Hind
中科院分区:
文献类型:
--
作者:
R. Hind
We show that the space of Lagrangian spheres inside the cotangent bundle of the 2-sphere, with its canonical symplectic structure, is contractible. We then discuss the phenomenon of Lagrangian unknottedness in other Stein surfaces. There exist homotopic Lagrangian spheres which are not Hamiltonian isotopic, but we show that in a typical case all such spheres are still equivalent under a symplectomorphism.