User talk:Dr. plato tesla

Hello, I'm David Eppstein. I wanted to let you know that one or more of your recent contributions to Tetrahedron have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Help Desk. Thanks. —David Eppstein (talk) 06:03, 30 January 2019 (UTC)

January 2019
Please stop your disruptive editing. If you continue to vandalize Wikipedia, as you did at Chinese University of Hong Kong, you may be blocked from editing. Matthew hk (talk) 02:25, 31 January 2019 (UTC)