@TechReport{	  Zumbusch:1996*3,
  author	= {G. W. Zumbusch},
  title		= {Multigrid Applied to Different Partial Differential
		  Operators},
  institution	= {Sintef Applied Mathematics},
  year		= {1996},
  address	= {Oslo, Norway},
  ps		= {http://wissrech.ins.uni-bonn.de/research/pub/zumbusch/mgOp.ps.gz}
		  ,
  pdf		= {http://wissrech.ins.uni-bonn.de/research/pub/zumbusch/mgOp.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 systems of equations as arising in linear
		  elasticity, non-symmetric equations as in
		  convection-diffusion problems, anisotropic operators and
		  bad conditioned equations as for jumping coefficients
		  problems. In the introductory report only the Laplacian and
		  smooth coefficients were treated. The first steps are
		  guided by a couple of examples and exercises.}
}