インテル® Fortran コンパイラー 19.0 デベロッパー・ガイドおよびリファレンス
Elemental and Transformational Intrinsic Functions (Generic): Compute Bessel functions of the second kind.
Elemental function: result = BESSEL_YN (n, x)
Transformational function: result = BESSEL_YN (n1, n2, x)
n, n1, n2 |
(Input) Must be of type integer and nonnegative. |
x |
(Input) Must be of type real with a value greater than zero. |
The result type and kind are the same as x.
The result of BESSEL_YN (n, x) is scalar. The result value of BESSEL_YN (n , x) is a processor-dependent approximation to the Bessel function of the second kind and order n of x.
The result of BESSEL_YN (n1, n2, x) is a rank-one array with extent MAX (n2 - n1 + 1, 0). Element i of the result value of BESSEL_YN (n1, n2, x) is a processor-dependent approximation to the Bessel function of the second kind and order n1 + i - 1 of x.
BESSEL_YN (2, 1.0) has the approximate value -1.651.