besselyzero

Function: besselyzero
Section: transcendental
C-Name: besselyzero
Prototype: GD1,L,b
Help: besselyzero(nu,{k=1}): k-th zero of the Y-bessel function
 of index nu.
Doc: $k$-th zero of the $Y$-Bessel function of index \var{nu}, close
 to $\pi(\nu/2 + k - 3/4)$.
 \bprog
 ? besselyzero(0) \\ @com{first zero of $Y_0$}
 %1 = 0.89357696627916752158488710205833824123
 ? bessely(0, %)
 %2 = 1.8708573650996561952 E-39
 ? besselyzero(0, 2) \\ @com{second zero}
 %3 = 3.9576784193148578683756771869174012814
 ? besselyzero(I) \\ @com{first zero of $Y_i$}
 %4 = 1.03930... + 1.3266...*I
 @eprog