  0 SNES Function norm 5.36093
  1 SNES Function norm 2.18599
  2 SNES Function norm 0.248149
  3 SNES Function norm 0.0337716
  4 SNES Function norm 0.00113078
  5 SNES Function norm 1.39276e-06
  6 SNES Function norm < 1.e-11
errors on 9 x 9 grid:  av |u-uexact|  = 3.076e-03,  |u-uexact|_inf = 1.334e-02
