User talk:Exysmer

September 2013
Hello, I'm Mark Arsten. I wanted to let you know that I undid one of your recent contributions, such as the one you made with this edit to Rigid-band model, 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. Mark Arsten (talk) 02:55, 21 September 2013 (UTC)