User talk:Napsu Karmitsa

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Hello,, 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: I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes ( ~ ); this will automatically produce your name and the date. If you need help, check out Questions, ask me on my talk page, or place  on your talk page and ask your question there. Again, welcome! Oleg Alexandrov (talk) 02:34, 7 February 2007 (UTC)
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Subderivative
Thank you for your fix at subderivative. You are right of course, I was a bit sloppy and forgot to mention that $$f$$ was convex (although I am not aware of subderivatives being defined or useful for non-convex functions). Cheers, Oleg Alexandrov (talk) 02:34, 7 February 2007 (UTC)