KEY TO ABBREVIATIONS AND SYMBOLS
The list shown below gives a brief description of the major mathematical
symbols defined in this dissertation.
E electric field
J current density
a conductivity
E permittivity
potential
Uz
A = e-0(At)
-y
1 e-/(At)
d = -- 7
7
= ( e 'Y(A t)) O_._
or
S= {(x,y,z) :0 < z < D, x\ < D\, yl\ < Dy},
where Dx, Dy, and D, are some prescribed values.
O, = {(x, y, z): Ix < 50 km, |y| < 50 km, 0 < z < 100 km}
Q2 = {(x, y, z) : x < 25 km, |y| < 25 km, 0 < z < 100 km}