%0 Journal Article %T Black Box Multigrid with coarsening by a factor of three %A Falgout, Robert D. %J Numerical Linear Algebra With Applications %V 17 %N 2‐3 %P 577-598 %@ 1070-5325 %D 2010-04-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve