@TechReport{	  Zumbusch:1996*4,
  author	= {G. W. Zumbusch},
  title		= {Multigrid on Different Grids},
  institution	= {Sintef Applied Mathematics},
  year		= {1996},
  address	= {Oslo, Norway},
  ps		= {http://wissrech.ins.uni-bonn.de/research/pub/zumbusch/mgGrid.ps.gz}
		  ,
  pdf		= {http://wissrech.ins.uni-bonn.de/research/pub/zumbusch/mgGrid.pdf}
		  ,
  annote	= {unrefereed},
  abstract	= {The report is a continuation of an introductory report on
		  the multigrid iterative solvers in Diffpack. We consider
		  the solution of equation systems arizing in the finite
		  element discretization of partial differential equations on
		  different grids. In the introductory report only uniform
		  partitions of the unit square and unit cube were treated.
		  Now we consider also multigrid for mapped elements, grids
		  generated by the meshing of super elements and unstructured
		  (and non nested) grids. The first steps are guided by a
		  couple of examples and exercises.}
}