User talk:NEEEEEERD

Hello, I'm David Eppstein. I wanted to let you know that I undid one or more of your recent contributions to Duality (projective geometry) because it did not appear constructive. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks! —David Eppstein (talk) 20:31, 29 January 2015 (UTC)

Please stop your disruptive editing. If you continue to vandalize Wikipedia, as you did at Duality (projective geometry), you may be blocked from editing. —David Eppstein (talk) 01:58, 30 January 2015 (UTC)