Birkhoff定理的推广

Birkhoff Theorem Spreading

因Ｂｉｒｋｈｏｆｆ定理是对不含宇宙项∧的四维时空成立，本文将该定理推广到含宇宙项∧的高维时空。

Because Birkhoff theorem is established in four dimensional times and spaces without cosmic term ∧, the paper, however, spreads this theorem to a higher dimensional space and time containing the cosmic term ∧.