problem                      bracket       root      m  ours n    ord   CH n    ord
fun1.1    [         2,          3]     2.0946   1.00       7   4.28      8   1.80
          |f| at root+1e-5 = 1.116e-04, root+1e-2 = 1.122e-01, ours x=+2.094551482 ok=True
fun1.2    [         1,         10]     2.0946   1.00      12   1.87     12   1.81
          |f| at root+1e-5 = 1.116e-04, root+1e-2 = 1.122e-01, ours x=+2.094551482 ok=True
fun1.3    [         1,        100]     2.0946   1.00      19   2.46     15   1.67
          |f| at root+1e-5 = 1.116e-04, root+1e-2 = 1.122e-01, ours x=+2.094551482 ok=True
fun1.4    [    -1e+04,      1e+04]     2.0946   1.00      59   3.63     24   2.02
          |f| at root+1e-5 = 1.116e-04, root+1e-2 = 1.122e-01, ours x=+2.094551482 ok=True
fun1.5    [    -1e+10,      1e+10]     2.0946   1.00      63   1.85     44   2.20
          |f| at root+1e-5 = 1.116e-04, root+1e-2 = 1.122e-01, ours x=+2.094551482 ok=True