User talk:Nikitadanilov

Welcome!
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Again, welcome! --Ghirla -трёп- 07:15, 24 April 2006 (UTC)

Arithmetic progression
Thank you for trying to fix Arithmetic progression. Such problems are often caused by recent vandalism and the best solution is to check the page history by clicking the "history" tab and see if there is a working version there. I have reverted the article to a version a few hours ago before it was vandalized. PrimeHunter (talk) 15:02, 25 January 2010 (UTC)