User talk:63.143.237.30

January 2017
Hello, I'm Alex Cohn. I wanted to let you know that one or more of your recent contributions to Ε-net (computational geometry) have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you think a mistake was made, or if you have any questions, you can leave me a message on my talk page. Thanks. Alex Cohn (talk) 06:09, 19 January 2017 (UTC)
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