  0 SNES Function norm 3.86571 
  1 SNES Function norm 1.3323 
  2 SNES Function norm 1.81987e-06 
  3 SNES Function norm 1.372e-11 
errors on 9 x 9 grid:  av |u-uexact|  = 3.076e-03,  |u-uexact|_inf = 1.334e-02
