step-4():
  dealii example code.

Solving problem in 2 space dimensions.
   Number of active cells: 256
   Total number of cells: 341
   Number of degrees of freedom: 289
   19 CG iterations needed to obtain convergence.
Solving problem in 3 space dimensions.
   Number of active cells: 4096
   Total number of cells: 4681
   Number of degrees of freedom: 4913
   20 CG iterations needed to obtain convergence.

step-4():
  Normal end of execution.