j0 man page on Ultrix

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bessel(3m)							    bessel(3m)

Name
       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)
       integer n;
       double x;

       double y0(x)
       double x;

       double y1(x)
       double x;

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

Description
       These  functions	 calculate  bessel  functions  of the first and second
       kinds for real arguments and integer orders.

Return Values
       Negative arguments cause and to return -HUGE_VAL and set errno to EDOM.
       Arguments  too  large  in magnitude cause and to return zero and to set
       errno to ERANGE.

Environment
       When your program is compiled using the System V environment,  nonposi‚Äź
       tive  arguments	cause and to return the value HUGE and to set errno to
       EDOM.  In addition, a message indicating DOMAIN error is printed on the
       standard error output.

       Arguments  too  large  in magnitude cause and to return zero and to set
       errno to ERANGE.	 In addition, a	 message  indicating  TLOSS  error  is
       printed on the standard error output.

       These error-handling procedures may be changed with the function

				      VAX			    bessel(3m)
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