A series expansion for the first positive zero of the Bessel functions

R. Piessens
1984 Mathematics of Computation  
It is shown that the first positive zeroy" , of the Bessel function Jv(x) is given by
doi:10.1090/s0025-5718-1984-0725995-7 fatcat:tdh4vghibnadpjcca3mfz7ms4q