message: using amg prec in ex33p
diff: @@ -172,15 +172,17 @@ int main(int argc, char *argv[])
  a.FormLinearSystem(ess_tdof_list, x, b, A, X, B);
  // 13. Solve the linear system A X = B.
  - Solver *M = new OperatorJacobiSmoother(a, ess_tdof_list);;
  + HypreBoomerAMG * prec = new HypreBoomerAMG;
  + prec->SetPrintLevel(-1);
  +
  CGSolver cg(MPI_COMM_WORLD);
  cg.SetRelTol(1e-12);
  cg.SetMaxIter(2000);
  cg.SetPrintLevel(3);
  - cg.SetPreconditioner(*M);
  + cg.SetPreconditioner(*prec);
  cg.SetOperator(*A);
  cg.Mult(B, X);
  - delete M;
  + delete prec;
  // 14. Recover the solution as a finite element grid function.
  a.RecoverFEMSolution(X, b, x);
  