1. Oct 4, 2013 #1

   M. next

   

   Is the grad([itex]\frac{\partial f}{\partial t}[/itex]) the same as [itex]\frac{\partial}{\partial t}[/itex](gradf)?
   
   Thank you.

    

   M. next, Oct 4, 2013
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3. Oct 4, 2013 #2

   tiny-tim

   

   Science Advisor

   Homework Helper

   Hi M. next!
   

   Unless f is really weird, yes.
   
   

   (it's the same test as whether ∂²f/∂x∂t = ∂²f/∂t∂x …
   
   i forget the exact conditions)​

    

   tiny-tim, Oct 4, 2013
4. Oct 4, 2013 #3

   M. next

   

   Thank you!

    

   M. next, Oct 4, 2013

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