@InCollection{ Griebel.Hullmann:2013, author = {M. Griebel and A. Hullmann}, title = {On a Multilevel Preconditioner and its Condition Numbers for the Discretized {L}aplacian on Full and Sparse Grids in Higher Dimensions}, year = {2014}, booktitle = {Singular Phenomena and Scaling in Mathematical Models}, publisher = {Springer International Publishing Switzerland}, pdf = {http://wissrech.ins.uni-bonn.de/research/pub/hullmann/GriebelHullmann2013_MultilevelPreconditioner.pdf} , note = {Also available as INS Preprint No. 1301}, pages = {263--296}, inspreprintnum= {1301}, annote = {series} }