#Notes# On Cosmology 2

For some reason,I haven't really finished the first note= = So I 'll just post the second one. There wouldn't be a lot of trouble since the first one was very elementary. (Of course, the notes in the near furture also remain elementary.) I was not at a position having access to the net earlier and I 'll try to finish the first one faster.

To obtain a pdf version of the note, click:

http://vdisk.weibo.com/s/DgQgqM0mn2_M  

and a tex version, click:

http://vdisk.weibo.com/s/DgQgqM0mn2X5