y0

Bessel Function of the Second Kind, Order 0

Portability: UNIX compatible

SYNOPSIS
DESCRIPTION
RETURN VALUE
DIAGNOSTICS
EXAMPLE
RELATED FUNCTIONS
SEE ALSO

SYNOPSIS

#include <lcmath.h>

double y0(double x);

DESCRIPTION

y0 computes the order 0 Bessel function of the second kind of the value x .

RETURN VALUE

y0 returns the order 0 Bessel function of the second kind of the argument x , provided that this value is computable.

DIAGNOSTICS

If the value of x is 0.0, a diagnostic message is written to the standard-error file ( stderr ) and the function returns -HUGE_VAL , the largest negative floating-point number that can be represented.

If the magnitude of x is too large (|x| > = 6.7465e9), y0 returns 0.0. In this case, the message "total loss of significance" is written to stderr .

If an error occurs in y0 , the _matherr routine is called. You can supply your own version of _matherr to suppress the diagnostic message or modify the value returned.

EXAMPLE

This example computes the Bessel function of the second kind, of order 0 at x = 5:

#include <stdio.h>
#include <lcmath.h>

main()
{
   double y;
   y = y0(5.);
   printf("y0(5.) = %lf\n", y);
}

RELATED FUNCTIONS

j0 , j1 , jn , _matherr , y1 , yn

SEE ALSO

Mathematical Functions

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