# Switch the divergence coordinate system

1. Nov 2, 2011

### oronanschel

1. The problem statement, all variables and given/known data
i have the divergence in the (x,y,z) Cartesian as $$\frac{dA_x}{dx}+\frac{dA_y}{dy}+\frac{dA_z}{dz}$$

and the assignment is to transfer it to cylindrical system $$(r,{\phi},z)$$, by any way i choose.

2. Relevant equations

tried with the chain rule, but i am doing something wrong, though
i get the gradient in the cylindrical system

2. Nov 2, 2011

### HallsofIvy

Staff Emeritus
It is impossible to tell you what, if anything, you are doing wrong if we cannot see what you did!

3. Nov 3, 2011

### oronanschel

look at 1 then 2

then there is 1+2

in the left side there are some derivatives , and variables
transformation to explain