Bessel Functions
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Include: <math.h>
Syntax: double j0( double x );
double j1( double x );
double jn( int n, double x );
double y0( double x );
double y1( double x );
double yn( int n, double x );
Returns: the result of a Bessel function of <x> if successful.
(y0, y1, and yn return -HUGE_VAL if <x> is negative.)
errno: EDOM (set by y0, y1, and yn if <x> is negative)
See also: _j0l, _j1l, _jnl, matherr, _y0l, _y1l, _ynl
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