In the computation of eddy current fields with edge elements it is known that the numerical stability can be rather inferior for the A/sup */-formulation, in comparison to that of the A, v-formulation. In this paper, the differences of the two formulations with regard to the convergence of an iterative solver will be pointed out. The result is a suggestion about a new preconditioner for the conjugate gradient method.
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Weiß et al. (2004) studied this question.
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