DY/DT = -Y, Y(0) = 1, FS_RKF45 0. 1.0 0.1 1 1.0 DY/DT = -Y, Y(0) = 1, FS_RKF45 0. 1.0 1.0 1 0.1 DY/DT = -Y, Y(0) = 1, FS_RKF45 0. 10.0 1.0 1 0.1 END OF RUNS