j1(3m) — DG/UX 4.00



                                                               bessel(3m)



        _________________________________________________________________
        j0, j1, jn, y0, y1, yn
        Bessel functions
        _________________________________________________________________


        SYNTAX

        #include <math.h>

        double j0 (x)
        double x;

        double j1 (x)
        double x;

        double jn (n, x)
        int n;
        double x;

        double y0 (x)
        double x;

        double y1 (x)
        double x;

        double yn (n, x)
        int n;
        double x;


        DESCRIPTION

        J0 and j1 return Bessel functions of x of the first kind of
        orders 0 and 1 respectively.  Jn returns the Bessel function of x
        of the first kind of order n.

        Y0 and y1 return Bessel functions of x of the second kind of
        orders 0 and 1 respectively.  Yn returns the Bessel function of x
        of the second kind of order n.  The value of x must be positive.


        DIAGNOSTICS

        Non-positive arguments cause y0, y1 and yn to return the value
        -HUGE and to set errno to EDOM.  A message indicating DOMAIN
        error is printed on the standard error output.

        Arguments that are too large cause j0, j1, y0 and y1 to return
        zero and to set errno to ERANGE.  A message indicating TLOSS
        error is printed on the standard error output.



        DG/UX 4.00                                                 Page 1
               Licensed material--property of copyright holder(s)



                                                               bessel(3m)



        You can change these error-handling procedures with the function
        matherr(3M).


        SEE ALSO

        matherr(3M).















































        DG/UX 4.00                                                 Page 2
               Licensed material--property of copyright holder(s)

Museum