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It could be that you just neglected to define the function f as a three-component vector, but even if you did, you would have gotten no result. The documentation for Curl in Mathematica version 8 doesn't tell you how to specify the coordinates, and the documentation for version 10 is not applicable in version 8. You can find the correct usage of Curl in ...


As indicated in the comments, this has been fixed as of version 9.0.0. lst = {{a1, a2}, {b1, b2}, {c1, c2}}; Derivative[1][lst[[1]] + #*(lst[[2]] - lst[[3]]) &] (* lst[[2]] - lst[[3]] & *)

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