  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
