Roots of bessj0: x f(x) root 1 2.404826 0.000000 root 2 5.520078 0.000000 root 3 8.653728 0.000000 root 4 11.791534 0.000000 root 5 14.930917 0.000000 root 6 18.071068 0.000001 root 7 21.211637 0.000000 root 8 24.352474 0.000000 root 9 27.493481 0.000000 root 10 30.634600 -0.000001 root 11 33.775822 0.000000 root 12 36.917095 0.000000 root 13 40.058430 0.000000 root 14 43.199791 0.000000 root 15 46.341187 0.000000 root 16 49.482609 0.000000