User talk:173.81.40.187

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September 2013[edit]

Information icon Hello, I'm Yintan. I wanted to let you know that I undid one of your recent contributions, such as the one you made with this edit to Matrix (mathematics), 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. Yintan  08:35, 10 September 2013 (UTC)