This ruins the time reversal symmetry, so if you look at past history you don't get the white hole part of the solution but rather a black hole forming towards the end of the stellar collapse.
This ruins the time reversal symmetry, so if you look at past history you don't get the white hole part of the solution but rather a black hole forming towards the end of the stellar collapse.
这就破坏了时间反演对称性，因此如果你顺着倒流的时光往前看，你将看不到这个解中所描述的白洞，而是看到黑洞变回坍塌中的恒星。