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arXiv 1703.09201math.DG
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复三维渐近柱面Calabi-Yau流形的胶合与变形

Gluing and deformation of asymptotically cylindrical Calabi-Yau manifolds in complex dimension three

Tim Talbot

摘要:

我们开发的一些后果之间的连接卡-丘结构和无挠$G_2$结构紧凑和渐近圆柱形的六维和七维流形。首先,我们改进了已知的渐近柱面Calabi-Yau三重匹配可胶合的证明。其次,我们给出了六维实流形上Calabi-Yau结构的模空间光滑的另一种证明,并将其推广到渐近柱面情形。最后,我们证明了在这些模空间之间扩展的卡-丘三重的胶合映射是一个局部自同构:也就是说,胶合卡-丘三重的每一个变形都是由渐近圆柱段的一个本质上唯一的变形引起的.

英文摘要:

We develop some consequences of the connection between Calabi-Yau structures and torsion-free $G_2$ structures on compact and asymptotically cylindrical six- and seven-dimensional manifolds. Firstly, we improve the known proof that matching asymptotically cylindrical Calabi-Yau threefolds can be glued. Secondly, we give an alternative proof that the moduli space of Calabi-Yau structures on a six-dimensional real manifold is smooth, and extend it to the asymptotically cylindrical case. Finally, we prove that the gluing map of Calabi-Yau threefolds, extended between these moduli spaces, is a local diffeomorphism: that is, that every deformation of a glued Calabi-Yau threefold arises from an essentially unique deformation of the asymptotically cylindrical pieces.

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