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arXiv 1107.0129math.SG
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管道中的精确拉格朗日量

Exact Lagrangians in plumbings

Mohammed Abouzaid, Ivan Smith

摘要:

考虑一个Stein流形M,它是通过在点上垂直维数大于大于或等于3的流形的余切丛而得到的。我们证明了M中Maslov类为零的闭正合拉格朗日量的Komaya范畴是由管道的紧核生成的。作为应用程序,我们在A2-Milnor纤维的任意尺寸的精确拉格朗日球进行分类,推导出的限制盘余切丛的Legendrian unknots的精确拉格朗日填充,并证明了范畴等价的球面扭曲在一个同源球通常是不实现任何compensated支持symplectomorphism。

英文摘要:

Consider a Stein manifold M obtained by plumbing cotangent bundles of manifolds of dimension greater than or equal to 3 at points. We prove that the Fukaya category of closed exact Lagrangians with vanishing Maslov class in M is generated by the compact cores of the plumbing. As applications, we classify exact Lagrangian spheres in A2-Milnor fibres of arbitrary dimension, derive constraints on exact Lagrangian fillings of Legendrian unknots in disk cotangent bundles, and prove that the categorical equivalence given by the spherical twist in a homology sphere is typically not realised by any compactly supported symplectomorphism.

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