user32240

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bio website zuchongzhi.wordpress.com
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age 23
visits member for 11 months
seen May 2 at 6:52
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I have Aspergers syndrome. So I try to socialize myself at here. You may reach me via my blog.


19 Actions

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Jun
11
 accepted What is the Lie algebra of the Galilean group and what is the structure of it?
Jun
8
 comment What is the Lie algebra of the Galilean group and what is the structure of it?
Thank you, this is very helpful.
Jun
8
 asked What is the Lie algebra of the Galilean group and what is the structure of it?
Jun
5
 comment Why Liouville's theorem is obvious?
@RonMaimon: A double-check of the author's proof verified your claim, thanks.
Jun
3
 comment Why Liouville's theorem is obvious?
@RonMaimon: I mean by realizing the determinant is 1, the proof just follows. It is easier than working with the mixed partial derivatives.
Jun
3
 comment Why Liouville's theorem is obvious?
Thanks! (I realized this myself).
Jun
3
 accepted Why Liouville's theorem is obvious?
Jun
3
 comment Why Liouville's theorem is obvious?
@RonMaimon: Thanks, did as you suggested.
Jun
3
 answered Why Liouville's theorem is obvious?
Jun
2
 awarded  Editor
Jun
2
 revised Why $\frac{d}{dt}r_{a}\nabla_{a}U_{ab}+\frac{d}{dt}r_{b}\nabla_{b}U_{ba}=\frac{d}{dt}U_{ab}?$
corrected the book name
Jun
2
 awarded  Supporter
Jun
2
 comment Why Liouville's theorem is obvious?
@Ron Maimon: This is helpful, but not so transparent to a layman like me (who learned Possion bracket yesterday). So I have to spend some time to understand this. Thanks for the help.
Jun
2
 awarded  Scholar
Jun
2
 comment Why $\frac{d}{dt}r_{a}\nabla_{a}U_{ab}+\frac{d}{dt}r_{b}\nabla_{b}U_{ba}=\frac{d}{dt}U_{ab}?$
Thanks! This is helpful .
Jun
2
 accepted Why $\frac{d}{dt}r_{a}\nabla_{a}U_{ab}+\frac{d}{dt}r_{b}\nabla_{b}U_{ba}=\frac{d}{dt}U_{ab}?$
Jun
2
 awarded  Student
Jun
2
 asked Why Liouville's theorem is obvious?
May
28
 asked Why $\frac{d}{dt}r_{a}\nabla_{a}U_{ab}+\frac{d}{dt}r_{b}\nabla_{b}U_{ba}=\frac{d}{dt}U_{ab}?$