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arXiv 0905.4190math.DGmath.SG
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几乎复欧几里得空间的复子流形

Complex submanifolds of almost complex Euclidean spaces

Antonio J. Di Scala, Luigi Vezzoni

摘要:

证明了对于殆复结构$J$,紧致Riemann曲面可实现为$(\mathbb{R}^4,J)$的伪全纯曲线当且仅当它是椭圆曲线.此外,我们证明了任何(几乎)复杂的$2n$环面可以全纯嵌入$(\mathbb{R}^{4n},J)$的一个合适的殆复结构$J$。这使得我们可以在几乎复欧几里得空间中嵌入任何紧致的黎曼曲面,并给出$\mathbb{R}^{2n}$中殆复结构的许多显式例子,这些例子不能被任何辛形式所驯服。

英文摘要:

We prove that a compact Riemann surface can be realized as a pseudo-holomorphic curve of $(\mathbb{R}^4,J)$, for some almost complex structure $J$ if and only if it is an elliptic curve. Furthermore we show that any (almost) complex $2n$-torus can be holomorphically embedded in $(\mathbb{R}^{4n},J)$ for a suitable almost complex structure $J$. This allows us to embed any compact Riemann surface in some almost complex Euclidean space and to show many explicit examples of almost complex structure in $\mathbb{R}^{2n}$ which can not be tamed by any symplectic form.

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