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arXiv math/0002243math.DG
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非单型Seiberg-Witten不变量与Einstein度量

Seiberg-Witten invariants of non-simple type and Einstein metrics

Heberto del Rio Guerra

摘要:

我们构造了具有Spin $^c$ -结构的四维流形的例子,其Seiberg-Witten方程解的模空间表示一个非平凡的正维数边类,即Spin $^c$ -结构不是由殆复结构诱导的.作为应用,我们证明了存在无穷多个具有自由基本群和预定欧拉示性数的非同胚紧定向4-流形,它们不携带Einstein度量.

英文摘要:

We construct examples of four dimensional manifolds with Spin$^c$-structures, whose moduli spaces of solutions to the Seiberg-Witten equations, represent a non-trivial bordism class of positive dimension, i.e. the Spin$^c$-structures are not induced by almost complex structures. As an application, we show the existence of infinitely many non-homeomorphic compact oriented 4-manifolds with free fundamental group and predetermined Euler characteristic and signature that do not carry Einstein metrics.

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