Tue Apr 19 14:47:03 2022 

midpoint_fixed_test()
  R version 3.4.4 (2018-03-15) 
  Test midpoint_fixed() for solving ordinary differential equations.

hund_midpoint_fixed
  R version 3.4.4 (2018-03-15) 
  Use midpoint_fixed() to solve the Hund ordinary differential equation.

stiff_midpoint_fixed
  R version 3.4.4 (2018-03-15) 
  Use midpoint_fixed() to solve the stiff ordinary differential equation.

midpoint_fixed_test():
  Normal end of execution.
Tue Apr 19 14:47:03 2022