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The article that you contributed, Euclid's Optics, is an excellent piece of work, especially for a first-time contributor. Thank you! I hope that you will become a regular contributor and editor here. Since you are interested in math, please check out Wikipedia:WikiProject Mathematics and its talk page, and consider joining the project. If you would like any help or guidance about Wikipedia, place {{helpme}} on a separate line of your talk page and ask your question right below that; an experienced editor will respond. Or, you may leave a message on my talk page. Again, thanks and welcome to Wikipedia! —Finell(Talk)03:37, 30 October 2009 (UTC)[reply]