POISSON:
  C version
  A program for solving the Poisson equation.

  The number of interior X grid lines is 9
  The number of interior Y grid lines is 9

INIT_SERIAL:
  Max norm of exact solution U at interior nodes = 0.724287

INIT_SERIAL:
  Max norm of boundary values = 0.841471

INIT_SERIAL:
  Max norm of right hand side F at interior nodes = 1.173345

  The X grid spacing is 0.100000
  The Y grid spacing is 0.100000

Step    ||U||         ||Unew||     ||Unew-U||     ||Unew-Exact||

  1      0.403397      0.497847      0.144939      0.492100
  2      0.570316      0.604994      0.063144      0.401573
  3      0.634317      0.651963      0.042232      0.329583
  4      0.667575      0.678126      0.030853      0.276557
  5      0.687708      0.694657      0.023025      0.241842
  6      0.701077      0.705958      0.018573      0.209427
  7      0.710522      0.714112      0.015431      0.180258
  8      0.717499      0.720232      0.013101      0.154437
  9      0.722829      0.724966      0.011164      0.135789
 10      0.727009      0.728717      0.009559      0.119854
 11      0.730356      0.731745      0.008259      0.105163
 12      0.733083      0.734229      0.007269      0.091711
 13      0.735336      0.736293      0.006412      0.079445
 14      0.737221      0.738029      0.005740      0.068294
 15      0.738814      0.739502      0.005145      0.058172
 16      0.740172      0.740762      0.004615      0.049555
 17      0.741339      0.741849      0.004142      0.042638
 18      0.742348      0.742791      0.003722      0.036469
 19      0.743225      0.743613      0.003346      0.030805
 20      0.743993      0.744333      0.003011      0.026831
 21      0.744667      0.744967      0.002711      0.029067
 22      0.745261      0.745526      0.002443      0.031049
 23      0.745787      0.746022      0.002202      0.032809
 24      0.746254      0.746463      0.001986      0.034378
 25      0.746669      0.746855      0.001791      0.035777
 26      0.747039      0.747205      0.001617      0.037029
 27      0.747369      0.747518      0.001460      0.038150
 28      0.747665      0.747799      0.001320      0.039155
 29      0.747930      0.748050      0.001194      0.040058
 30      0.748168      0.748276      0.001080      0.040869
 31      0.748382      0.748479      0.000977      0.041789

POISSON:
  The iteration has converged

POISSON:
  Normal end of execution.