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tiny-tim
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Feb11-12, 10:34 AM
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Quote Quote by abrowaqas View Post
what this link say about dual nature of nabla? can anybody explain?

http://books.google.com.pk/books?id=...ed=0CDwQ6AEwAg
oh, that's completely different from what i thought you were asking about!
that book (by bernard maxum) is saying that ∇ is both a vector and a derivative

in general (not cartesian) coordinates, the simple "dot" and "cross" procedure doesn't work

that's what it means by the "dual nature" of ∇