Talk:Four-gradient

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Importance to math students: One of the first steps on graduate level. Importance in General: Between important fill & specialized knowledge (mid/lowmid)

Two References have been added. The corresponding german wikipage has a non-english link. Maybe a link to Wolfram would be better

                                Phi0618 (talk) 17:55, 21 November 2007 (UTC)

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• This page was last modified 17:55, 21 November 2007 by Wikipedia user Phi0618. Based on work by Wikipedia user(s) Peelbot.
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