Equation Icon  integral --r'---- 3 ' U = |x - x'|d x, integral r'(x - x')i(x- x')j Uij = -----------'3------d3x', |x- x| integral r'r''(x - x') ( x' - x'' x- x'' ) PW = ------------. --------- --------- d3x'd3x'', |x - x'|3 |x- x''| |x' - x''| integral ' ' ' 2 A = r[v-.(x---x-)]-d3x', |x - x'|3 integral -r'v'2--- 3 ' P1 = |x - x'|d x, integral r'U ' 3 ' P2 = |x---x'|d x, integral r'TT' P3 = ------'d3x', |x - x | integral p' P4 = -------d3x', |x - x'| integral '' Vi = --rvi--d3x', |x - x'| integral ' ' ' ' W = r[v-.(x---x-)](x----x)id3x'. i |x - x'|3