Wikipedia:WikiProject Physics/Taskforces/Relativity/Noticeboard

Lorentz factor misinformation
In Lorentz factor we find: u is the velocity as observed in the reference frame where time t is measured

This information is not ok and may result in misinterpretation. u is the relative velocity of two reference frames, connected to observing and observed object. If these objects observe each other, the measure the same velocity. In this sense, the velocity is absolute.

This error should be corrected by a native speaker in simple words. ErNa 11:57, 20 December 2006 (UTC)


 * 1. Shouldn't this be in the Talk:Lorentz factor?
 * 2. I don't see how misterpretation is possible. The statement you critize simply says that u and t are measured in the same frame. 'Absolute' is understood in relativity to mean 'independent of frame of reference', not 'the same for two observers'. A third observer will generally measure a speed between the first two observers that is not equal to u. Paradoctor (talk) 14:53, 4 March 2008 (UTC)

General coordinate invariance
I have put the article General coordinate invariance up for deletion, as general covariance already exists. To vote, go here. MP  (talk) 22:51, 4 April 2007 (UTC)

General relativity is a FA
Thanks to the indefatigable work of Markus Poessel and others, General relativity is at long last a Featured article ! I have traced the progress of this article since January 2005, contributing where I could; after seeing this article go through all the convoluted changes, it is so pleasing that the article is at long last one of Wikipedia's finest works. Well done everyone! MP (talk•contribs) 17:30, 27 June 2008 (UTC)