关于黑洞视界的简并性、边缘稳定性和极值性的注记
A note on degeneracy, marginal stability and extremality of black hole horizons
摘要：
给定一个静止轴对称黑洞视界，其视界截面的特征为一个严格未来稳定的边缘外捕获面，我们将视界简并性和边缘稳定性概念之间的等价性推广到在主能量条件下满足视界截面的面积$A$和角动量J之间的A=8π |J|几何关系.
英文摘要：
Given a stationary axisymmetric black hole horizon admitting a section characterised as a strictly future stable marginally outer trapped surface, we extend the equivalence between the notions of horizon degeneracy and marginal stability to the fulfillment, under the dominant energy condition, of the A=8π|J| geometric relation between the area $A$ and the angular momentum J of a horizon section.
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