User talk:Jashgdjgakya

December 2013
Hello, I'm Jujutacular. I wanted to let you know that I undid one of your recent contributions, such as the one you made with this edit to Doppler effect, because it didn’t appear constructive to me. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. Jujutacular (talk) 20:30, 21 December 2013 (UTC)