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Rodrigo, C. (author), Gaspar, F.J. (author), Oosterlee, C.W. (author), Yavneh, I. (author)The full multigrid (FMG) algorithm is often claimed to achieve so-called discretization-level accuracy. In this paper, this notion is formalized by defining a worst-case relative accuracy measure, denoted ElFMG, which compares the total error of the l-level FMG solution against the inherent discretization error. This measure can be used for...journal article 2010