I am looking at an explanation of the gradient operator acting on a scalar function ## \phi ##. This is what is written:(adsbygoogle = window.adsbygoogle || []).push({});

In the steps 1.112 and 1.113 it is written that ## \frac {\partial x'_k} {\partial x'_i} ## is equivalent to the Kronecker delta. It makes sense to me that if i=k, then the expression is equal to 1 but why would it be 0 if they are not equal? Perhaps I'm not looking at it the right way but any explanation would be appreciated.

Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# I Kronecker Delta and Gradient Operator

Have something to add?

Draft saved
Draft deleted

**Physics Forums | Science Articles, Homework Help, Discussion**