我們放寬宇宙是均勻均向的限制，只假設宇宙是均勻的，而不一定均向。所以我們引進了Bianchi的空間慨念。而我們引進J. D. Barrow的論文為基底，並從此開始探討。進而發現其中的缺陷，於是後來我們又引進的5維空間下的宇宙學Brane Cosmology的關念。並且討論其穩定與否。

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