许多一般相对论中的许多经典定理都基于基础Lorentzian时空的局部几何形状结合。这些局部约束通常具有曲率平衡(如ricci张量)和通过爱因斯坦方程(Einstein方程)的下限形式,它们被解释为能量条件。这样的条件是无效的条件,需要在零向量方向上ricci张量无负。The null energy condition plays a crucial role in the Penrose Singularity Theorem about in- completeness of null geodesics [ Pen65 ] which forshadowed the existence of black holes and in Hawking's Area Monotonicity Theorem [ Haw72 ] which as- serts that the area of cross-sections of a black hole horizon is non-decreasing towards the future provided the horizon is future null complete.在本文中,我们介绍了沿未来指导的未来指导的测量无效的无效凸出的熵凸度的零兹歧管的零能量条件的表征。
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