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Small question about derivatives and gradients.

  1. Oct 4, 2013 #1
    Is the grad([itex]\frac{\partial f}{\partial t}[/itex]) the same as [itex]\frac{\partial}{\partial t}[/itex](gradf)?

    Thank you.
  2. jcsd
  3. Oct 4, 2013 #2


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    Hi M. next! :wink:
    Unless f is really weird, yes. :smile:

    (it's the same test as whether ∂2f/∂x∂t = ∂2f/∂t∂x …

    i forget the exact conditions)​
  4. Oct 4, 2013 #3
    Thank you!
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