I ran across the following in a book, but I don't quite understand why we have fx+p fz=0 (and similarly with y). A little guidance would be greatly appreciated.

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- Jan 19th 2013, 02:39 PMHal2001Simple PDE Question
I ran across the following in a book, but I don't quite understand why we have fx+p fz=0 (and similarly with y). A little guidance would be greatly appreciated.

Attachment 26615 - Jan 19th 2013, 07:18 PMTheEmptySetRe: Simple PDE Question
- Jan 19th 2013, 07:26 PMHal2001Re: Simple PDE Question
:) got it thanks. Didn't realize at the time that they were defining z as a function of x and y. But it makes sense now.