Sorry, this is a cube. I've never taken PDE's and Diff Eq was a few years ago, consequently my math kind of sucks (I'm trying to catch up as fast as possible). What I was trying to do with the symmetry thing was this:
If X''/X+Y''/Y+Z''/Z=0 then each term individually should equal a constant...
Homework Statement
Empty cubic box of dimension "a" with conducting walls. Two opposite walls are held at a constant potential V, while the other walls are grounded. Find an expression for the electric potential inside the box. (Assume box centered on the origin, walls are all normal to one...