摘要：In this paper we research the lower bound of the eigenvalue of Spin^c Diracoperator on the Spin^c manifold. By the Weisenboeck formula, we get an estimate of it, then following the idea of Th Friedrich [2] and X Zhang [6]. We get a finer estimate of it. As an application, we give a condition when the Seiberg-Witten equation only has 0 solution.

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