29 November 2023 8:00:13.102 PM fsolve_test(): FORTRAN90 version Test fsolve(), which solves systems of nonlinear equations. fsolve_test1(): fsolve() solves a nonlinear system of 1 equation. Initial X and F(X) 1 0.00000 -5.00000 Satisfactory computation. Final X and F(X) 1 4.27523 -0.590983E-10 fsolve_test2(): fsolve() solves a nonlinear system of 2 equations. Initial X and F(X) 1 3.00000 -13.0000 2 0.00000 11.0000 Satisfactory computation. Final X and F(X) 1 1.00000 -0.961951E-10 2 1.00000 -0.123539E-09 fsolve_test3(): fsolve() solves a nonlinear system of 4 equations. Initial X and F(X) 1 0.00000 1.00000 2 0.00000 4.00000 3 0.00000 9.00000 4 0.00000 16.0000 Returned value of INFO = 4 Final X and F(X) 1 1.00000 0.493038E-31 2 2.00000 0.197215E-30 3 3.00000 0.00000 4 4.00000 0.788861E-30 fsolve_test4(): fsolve() solves a nonlinear system of 8 equations. Initial X and F(X) 1 0.00000 1.00000 2 0.00000 1.00000 3 0.00000 1.00000 4 0.00000 1.00000 5 0.00000 1.00000 6 0.00000 1.00000 7 0.00000 1.00000 8 0.00000 1.00000 Satisfactory computation. Final X and F(X) 1 -0.570470 -0.851213E-06 2 -0.681140 0.160753E-05 3 -0.700429 -0.116446E-05 4 -0.700672 0.174651E-06 5 -0.691736 0.110893E-05 6 -0.665768 -0.159886E-05 7 -0.596029 0.739477E-06 8 -0.416411 -0.560667E-07 predator_prey_be_test(): Initial ||ym-yo-(tm-to)*dydt(tm,ym)||: 9500.00 Final ||ym-yo-(tm-to)*dydt(tm,ym)||: 0.370114E-04 predator_prey_tr_test(): Initial residual norm: 9500.00 Final residual norm: 0.532268E-11 stiff_bdf2_test(): Initial residual: 0.474551 Final residual: 0.333067E-15 stiff_be_test(): Initial ||ym-yo-(tm-to)*dydt(tm,ym)||: 12.1114 fsolve_be() returned error flag info = 4 Final ||ym-yo-(tm-to)*dydt(tm,ym)||: 0.666134E-15 stiff_tr_test(): Initial residual norm: 12.3057 fsolve_tr() returned error flag info = 4 Final residual norm: 0.444089E-15 fsolve_test(): Normal end of execution. 29 November 2023 8:00:13.103 PM