推 krishuang: Friedmann-Lemaître-Robertson-Walker metric 02/22 20:32
抱歉我終於好像想起來了,特開一篇好了
Lemaître coordinates
http://en.wikipedia.org/wiki/Lema%C3%AEtre_coordinates
Georges Lemaître was the first to show that this is not a real physical
singularity but simply a manifestation of the fact that the static
Schwarzschild coordinates cannot be realized with material bodies inside the
gravitational radius. Indeed inside the gravitational radius everything falls
towards the centre and it is impossible for a physical body to keep a
constant radius.
.
.
.
The Lemaître coordinate system is synchronous, that is, the global time
coordinate of the metric defines the proper time of co-moving observers. The
radially falling bodies reach the gravitational radius and the centre within
finite proper time.
我剛剛只記得他是神父而已
http://en.wikipedia.org/wiki/Georges_Lema%C3%AEtre
其實宇宙學反而數學簡單裡面後來用到的都是大一微積分而已,困難的是想出這些天才
的變換,這裡面蠻多天才的數學變換都是掛名字的
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 1.162.95.84
※ 文章網址: https://www.ptt.cc/bbs/Physics/M.1424586566.A.AC2.html