9.40 BESSEL_Y1 — Bessel function of the second kind of order 1

Description:

BESSEL_Y1(X) computes the Bessel function of the second kind of order 1 of X. This function is available under the name BESY1 as a GNU extension.

Standard:

Fortran 2008 and later

Class:

Elemental function

Syntax:

RESULT = BESSEL_Y1(X)

Arguments:

X	The type shall be REAL.

Return value:

The return value is of type REAL. It has the same kind as X.

Example:

program test_besy1
  real(8) :: x = 1.0_8
  x = bessel_y1(x)
end program test_besy1

Specific names:

Name	Argument	Return type	Standard
DBESY1(X)	REAL(8) X	REAL(8)	GNU extension