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ru-4 Этот участник владеет русским языком почти как родным.
Carl Friedrich Gauss.jpg This user is an expert in mathematics.
Original Barnstar.png The Original Barnstar
This Barnstar is hereby awarded to Arcfrk for some really outstanding comments made in the discussion on Hilbert Space and how to make the intro more accessible. Excellent advice, especially from someone who has apparently just arrived. Welcome! If your contributions are all this good, you'll be a significant force for the improvement of Wikipedia.
*Septegram*Talk*Contributions* 21:06, 12 March 2007 (UTC)

"As you have probably figured out by now, it is a complete waste of your time to argue with rude and ignorant editors about topics they do not understand. Wikipedia has an unlimited supply of such editors, and it is best just to ignore them. R.e.b. (talk) 19:28, 25 March 2008 (UTC)" (copied from [1])