BesselJZero

BesselJZero[n, k] represents the kth zero of the Bessel function Jn(x).

BesselJZero[n, k, x0] represents the kth zero greater than x0.

Examples

Find zeros of Bessel J:

N[BesselJZero[0, 1]]
(* 2.40483 *)

N[BesselJZero[1, 2]]
(* 7.01559 *)

Please visit the official Wolfram Language Reference for more details.