Compute Bessel functions of the second kind.

    This function is supported on OpenVMS Integrity servers and
    Alpha only.

    Format

      #include  <math.h>

      double y0  (double x);

      float y0f  (float x);

      long double y0l  (long double x);

      double y1  (double x);

      float y1f  (float x);

      long double y1l  (long double x);

      double yn  (int n, double x);

      float ynf  (int n, float x);

      long double ynl  (int n, long double x);

1  –  Arguments

 x

    A positive, real value.

 n

    An integer.

2  –  Description

    The y0 functions return the value of the Bessel function of the
    second kind of order 0.

    The y1 functions return the value of the Bessel function of the
    second kind of order 1.

    The yn functions return the value of the Bessel function of the
    second kind of order n.

3  –  Return Values

    x                  The relevant Bessel value of x of the second
                       kind.
    -HUGE_VAL          The x argument is 0.0; errno is set to ERANGE.
    NaN                The x argument is negative or NaN; errno is
                       set to EDOM.
    0                  Underflow occurred; errno is set to ERANGE.
    HUGE_VAL           Overflow occurred; errno is set to ERANGE.