OFFSET
1,1
COMMENTS
Also the first root of the sinc(2,x) function, that is, the radial component of the 2D Fourier transform of a 2-dimensional unit disc. - Stanislav Sykora, Nov 14 2013
Also the first root of the derivative of BesselJ_0. - Jean-François Alcover, Jul 01 2015
LINKS
Stanislav Sykora, K-Space Images of n-Dimensional Spheres and Generalized Sinc Functions
Eric Weisstein's World of Mathematics, Bessel Function Zeros
EXAMPLE
3.8317059702075123156...
MATHEMATICA
BesselJZero[1, 1] // N[#, 105]& // RealDigits // First (* Jean-François Alcover, Feb 06 2013 *)
PROG
(PARI) solve(x=3, 4, besselj(1, x)) \\ Charles R Greathouse IV, Feb 19 2014
(PARI) besseljzero(1) \\ Charles R Greathouse IV, Aug 06 2022
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Eric W. Weisstein, Jan 21 2006
STATUS
approved