What is the potential error in the proof of no magnetic fields?

[kevi555]

Hi,

I'm looking at question #33 of the linked book on page 391.

http://books.google.ca/books?id=4fX...teDzDg&sa=X&oi=book_result&ct=result&resnum=1

I feel like the error lies within the B=curl(grad(u)) = 0 statement. Could it be something dimensionally incompatible?

Thanks.

 

[lanedance]

hi kevi55

had a very quick look... could it be something like divergence theorem is for a closed surface so doesn't have a boundary to invoke stokes theorem on?