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arXiv math/0608110math.AGmath.SG
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代数曲面的正则辛结构与变形

Canonical symplectic structures and deformations of algebraic surfaces

Fabrizio Catanese

摘要:

我们证明了一般类型的极小曲面具有正则辛结构(直到辛同构为止是唯一的),该结构对于光滑变形是不变的。我们表明,symplectomorphism类型也是不变的变形,允许某些正常的奇点,提供一个仍然在同一个平滑组件。我们使用这种技术表明,Manetti表面产生的例子,一般类型的表面是不变形等效的,但典型的syplectomorphic。

英文摘要:

We show that a minimal surface of general type has a canonical symplectic structure (unique up to symplectomorphism) which is invariant for smooth deformation. We show that the symplectomorphism type is also invariant for deformations which allow certain normal singularities, provided one remains in the same smoothing component. We use this technique to show that the Manetti surfaces yield examples of surfaces of general type which are not deformation equivalent but are canonically symplectomorphic.

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