四维和五维前子的回归
The return of the four- and five-dimensional preons
摘要：
我们证明了3/4-BPS前子在四维和五维规范超引力中的存在性，通过明确地将它们构造为AdS_4和AdS_5极大超对称背景的光滑子。这个结果说明了时空拓扑如何恢复了先前被Killing旋量方程的局部分析排除的超对称性。
英文摘要：
We prove the existence of 3/4-BPS preons in four- and five-dimensional gauged supergravities by explicitly constructing them as smooth quotients of the AdS_4 and AdS_5 maximally supersymmetric backgrounds, respectively. This result illustrates how the spacetime topology resurrects a fraction of supersymmetry previously ruled out by the local analysis of the Killing spinor equations.
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