Talk:Four-momentum
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You can find some info here: [1] (http://en.wikipedia.org/w/wiki.phtml?title=Minkowski_space&oldid=2784964).
Also note that are two convension:
- Take c = 1. In that case x = t, E = m = P etc.
- Keep on classical units of time and space and take x = c*t so c keeps its MKS\CGS value. I formulated my addition according to that convension.
Both are valid and should be appeared in the article. MathKnight 21:54, 16 Mar 2004 (UTC)