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arXiv 1502.05252math.DG
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Kähler-Einstein流形上${\rm spin}^c$ Dirac算子和调和形式的Eigenvalue估计

Eigenvalue Estimates of the ${\rm spin}^c$ Dirac Operator and Harmonic Forms on Kähler-Einstein Manifolds

Roger Nakad, Mihaela Pilca

摘要:

我们建立了定义在正数量曲率的紧致Kähler-Einstein流形上的Dirac算子的特征值的一个下界,并赋予了特殊的${\rm spin}^c$结构.极限情形的特征是在旋量丛的某个子丛中存在Kählerian Killing ${\rm spin}^c$旋量。此外,我们证明了一个有效的调和形式和一个Kählerian Killing ${\rm spin}^c$旋量场之间的Clifford乘法为零。这将A的结果推广到${\rm spin}^c$的情况。Moroianu指出,在一个紧凑的凯勒-爱因斯坦流形的复杂尺寸$4\ell+3$携带一个复杂的切触结构,克利福德乘法之间的有效谐波形式和凯勒的Killing旋量是零。

英文摘要:

We establish a lower bound for the eigenvalues of the Dirac operator defined on a compact Kähler-Einstein manifold of positive scalar curvature and endowed with particular ${\rm spin}^c$ structures. The limiting case is characterized by the existence of Kählerian Killing ${\rm spin}^c$ spinors in a certain subbundle of the spinor bundle. Moreover, we show that the Clifford multiplication between an effective harmonic form and a Kählerian Killing ${\rm spin}^c$ spinor field vanishes. This extends to the ${\rm spin}^c$ case the result of A. Moroianu stating that, on a compact Kähler-Einstein manifold of complex dimension $4\ell+3$ carrying a complex contact structure, the Clifford multiplication between an effective harmonic form and a Kählerian Killing spinor is zero.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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