·伯克霍夫给出。平均分布定理是遍历定理的一个特殊情况,专门处理单位间隔上的概率分布。 始态复现定理 G. D. Birkhoff, Proof of the ergodic theorem, (1931), Proceedings of the National Academy of Sciences
who first published the solution in 1916. According to Birkhoff'stheorem(英语:Birkhoff'stheorem (relativity)), the Schwarzschild metric is the most general