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Aspects of the stability of time-domain update schemes for electromagnetic problems are examined based on the consideration of system amplification matrices arising from the discretization of Maxwell's equations in the sequence space. We discuss time-domain stability for a given discretization scale and under three different assumptions of decreasing generality: general updates, general leapfrog updates, and reciprocal leapfrog updates.
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Wang et al. (2004) studied this question.
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