139
A..
(JUJ JUJ) (JU2 J U 2)
LIU = dx2 + ay2 el + dx2 +Jj2 e,
and for every function q from Q or .Qx into R :
Curlq = (()q - ()q) .
ay' dx '
We will also denote by (.,.) and I. I, the inner product and the associated norm in
L2(.Qx), L2(.Qxl, L 2 m), and L 2 mi,