Small question about derivatives and gradients.

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

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  • #2
tiny-tim
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Hi M. next! :wink:
Is the grad([itex]\frac{\partial f}{\partial t}[/itex]) the same as [itex]\frac{\partial}{\partial t}[/itex](gradf)?
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)​
 
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Thank you!
 

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