Welcome

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Welcome!

Hello, Songjie509, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

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Whitney C^k-topology

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Further to your question on the maths reference desk; I decided to write an article on the Whitney Ck-topologies and the Whitney C-topology. I hope you find it useful. Fly by Night (talk) 21:05, 12 August 2010 (UTC)Reply