MirOS Manual: j0(3), j0f(3), j1(3), j1f(3), jn(3), jnf(3), y0(3), y0f(3), y1(3), y1f(3), yn(3), ynf(3)

J0(3)                      BSD Programmer's Manual                       J0(3)

NAME

     j0, j0f, j1, j1f, jn, jnf, y0, y0f, y1, y1f, yn, ynf - Bessel functions
     of first and second kind

LIBRARY

     libm

SYNOPSIS

     #include <math.h>

     double
     j0(double x);

     float
     j0f(float x);

     double
     j1(double x);

     float
     j1f(float x);

     double
     jn(int n, double x);

     float
     jnf(int n, float x);

     double
     y0(double x);

     float
     y0f(float x);

     double
     y1(double x);

     float
     y1f(float x);

     double
     yn(int n, double x);

     float
     ynf(int n, float x);

DESCRIPTION

     The functions j0(), j0f(), j1() and j1f() compute the Bessel function of
     the first kind of the order 0 and the order 1, respectively, for the real
     value x; the functions jn() and jnf() compute the Bessel function of the
     first kind of the integer n for the real value x.

     The functions y0(), y0f(), y1() and y1f() compute the linearly indepen-
     dent Bessel function of the second kind of the order 0 and the order 1,
     respectively, for the positive integer value x (expressed as a double);
     the functions yn() and ynf() compute the Bessel function of the second
     kind for the integer n for the positive integer value x (expressed as a
     double).

RETURN VALUES

     If these functions are successful, the computed value is returned, other-
     wise the global variable errno is set to EDOM and a reserve operand fault
     is generated.

SEE ALSO

     math(3)

HISTORY

     This set of functions appeared in Version 7 AT&T UNIX.

MirOS BSD #10-current           April 19, 1991                               1

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