“…Methods of calculation vary widely, with almost all possible having been tried at one time or another. These include methods of charge simulation, [4][5][6][7]11,13,16,23,28 finite element, 1,4,5,8,9,18,20,27,28 integral equation, 25,28 neural networks, 31 iteration, 2,5,8,28 flux tracing, 2,16,17,24 analytic expansions, 10,23 boundary elements, 22 and finally direct measurement. 15,19,21,29,31 In contrast, verification of calculations involves a more limited repertoire of methods; namely comparison to measurements, 1,2,[6][7][8][9]11,17,21,24,[27][28]…”