09 April 2025 10:50:57 AM

standing_wave_exact_test():
  C version
  Test standing_wave_exact(),
  an exact standing wave solution of the wave equation.

  parameters:
    c     = 0.2
    xmin  = -1
    xmax  = 1
    t0    = 0
    tstop = 5

standing_wave_residual_test():
  Evaluate solution and residual at selected points (X,T)

      X       T       U(X,T)      Resid(X,T)

   -1.0000    0.0000     -0.8415               0
   -0.8000    0.0000     -0.7174               0
   -0.6000    0.0000     -0.5646               0
   -0.4000    0.0000     -0.3894               0
   -0.2000    0.0000     -0.1987               0
    0.0000    0.0000           0               0
    0.2000    0.0000      0.1987               0
    0.4000    0.0000      0.3894               0
    0.6000    0.0000      0.5646               0
    0.8000    0.0000      0.7174               0
    1.0000    0.0000      0.8415               0

   -1.0000    1.2500     -0.8153     6.93889e-18
   -0.8000    1.2500     -0.6951               0
   -0.6000    1.2500     -0.5471     3.46945e-18
   -0.4000    1.2500     -0.3773               0
   -0.2000    1.2500     -0.1925    -8.67362e-19
    0.0000    1.2500           0               0
    0.2000    1.2500      0.1925     8.67362e-19
    0.4000    1.2500      0.3773               0
    0.6000    1.2500      0.5471    -3.46945e-18
    0.8000    1.2500      0.6951               0
    1.0000    1.2500      0.8153    -6.93889e-18

   -1.0000    2.5000     -0.7385               0
   -0.8000    2.5000     -0.6295               0
   -0.6000    2.5000     -0.4955     3.46945e-18
   -0.4000    2.5000     -0.3417               0
   -0.2000    2.5000     -0.1743               0
    0.0000    2.5000           0               0
    0.2000    2.5000      0.1743               0
    0.4000    2.5000      0.3417               0
    0.6000    2.5000      0.4955    -3.46945e-18
    0.8000    2.5000      0.6295               0
    1.0000    2.5000      0.7385               0

   -1.0000    3.7500     -0.6157               0
   -0.8000    3.7500     -0.5249               0
   -0.6000    3.7500     -0.4131               0
   -0.4000    3.7500     -0.2849    -1.73472e-18
   -0.2000    3.7500     -0.1454    -8.67362e-19
    0.0000    3.7500           0               0
    0.2000    3.7500      0.1454     8.67362e-19
    0.4000    3.7500      0.2849     1.73472e-18
    0.6000    3.7500      0.4131               0
    0.8000    3.7500      0.5249               0
    1.0000    3.7500      0.6157               0

   -1.0000    5.0000     -0.4546               0
   -0.8000    5.0000     -0.3876     1.73472e-18
   -0.6000    5.0000     -0.3051               0
   -0.4000    5.0000     -0.2104               0
   -0.2000    5.0000     -0.1073               0
    0.0000    5.0000           0               0
    0.2000    5.0000      0.1073               0
    0.4000    5.0000      0.2104               0
    0.6000    5.0000      0.3051               0
    0.8000    5.0000      0.3876    -1.73472e-18
    1.0000    5.0000      0.4546               0


standing_wave_exact_test():
  Normal end of execution.
09 April 2025 10:50:57 AM