On Jul 16, 10:18*pm, Andrew Usher wrote:
[snip]
Charge, after all, is quantised, and the derivatives therefore are all
either zero or infinite. Therefore the differential equations can only
be an approximation, while the integral forms are exact.
[snip]

You need to study up on what "quantized" means. It does
not mean that the things you are considering taking the
derivative of are not continuous. Go back and read your
intro quantum text again. Get a few more. The functions
are quantum wave functions. Figure out what that means.

Then go away and stop being so silly.
Socks